Apologies for the delay, I didn't get the response email.
$ dpkg-query -f '${Conffiles}\n' -W apache2
/etc/cron.daily/apache2 9b3ae5369cc027e7116098a41690fdd7
/etc/logrotate.d/apache2 77a860c99020888744696d024b9ad0d6
/etc/init.d/apache2 2a07f21c8e3889b143440f5727a63757
/etc/apache2/ports.conf a961f23471d985c2b819b652b7f64321
/etc/apache2/envvars 331419cf134c3cdce519b0d0f151cbc9
/etc/apache2/mods-available/authz_dbd.load c746b8c3bf3fca950ca41fcd553328b4
/etc/apache2/mods-available/proxy_express.load
f2ad6e7e80d2750cdca5986657e7835e
/etc/apache2/mods-available/dav_fs.conf 162db96239f13b5416f369b6306d9db6
/etc/apache2/mods-available/authn_core.load c6420ed74b0095f8408aba3e11db4907
/etc/apache2/mods-available/log_forensic.load 7177e2427eb7c78f1ab10c034a809793
/etc/apache2/mods-available/mpm_event.conf d868a76835101a66be2863362ef9f81a
/etc/apache2/mods-available/slotmem_plain.load fd33fcd86c77d4d5044ad904e7f38360
/etc/apache2/mods-available/ldap.load 735ac5f246738e11a53f6c515b8dfc48
/etc/apache2/mods-available/reflector.load 306c71fae73733506db9099d106ba642
/etc/apache2/mods-available/authn_dbd.load 86e21a672a4f245715a788f9873174ed
/etc/apache2/mods-available/setenvif.conf 533f5f92761c2c24d6820f1d7d1c45ad
/etc/apache2/mods-available/dir.load 397aadae1b8b18e3a7a233cf7c297f99
/etc/apache2/mods-available/status.conf
5d3689f109baf304af4f145249ca6326
/etc/apache2/mods-available/log_debug.load d062328e5987fa686615394768339abe
/etc/apache2/mods-available/autoindex.load b9f9d364f1b4c96c45b6db353180aa15
/etc/apache2/mods-available/dav_lock.load faad09687e64ebb9670aa0b8095d6642
/etc/apache2/mods-available/mpm_worker.load 9e5e8221c6376ad90bb81a130db64a1c
/etc/apache2/mods-available/proxy_balancer.conf 5e9113f9556e17c0fec6c81232651791
/etc/apache2/mods-available/info.load c1faffe40b8bed9f2b817b9dc0503bb6
/etc/apache2/mods-available/sed.load 8ba3c7ff4243e6a45b6e3c372fc0de1b
/etc/apache2/mods-available/proxy_balancer.load 9c6e6ff2195159c8af97f7673e8d2ada
/etc/apache2/mods-available/expires.load dac64edc06fe538c2edd7b3f1f3b03f1
/etc/apache2/mods-available/mime.load 9c858dc2ad2825dc3f862ecba90cf6ec
/etc/apache2/mods-available/mime_magic.conf
ebeaf79afde03c805e795bb51eec155f
/etc/apache2/mods-available/lbmethod_byrequests.load f33d55ab5bbf907340426e31f99f6701
/etc/apache2/mods-available/session_cookie.load 89aff7a7f8b4347965d4cf6ea3c5beb9
/etc/apache2/mods-available/proxy_ajp.load e058e03c1d4f9e4d8e2c439ed75cc501
/etc/apache2/mods-available/lbmethod_heartbeat.load 944703ff299a25cf068de7f6a2374465
/etc/apache2/mods-available/headers.load ba7d09162b65d09397bd58be33138e4d
/etc/apache2/mods-available/access_compat.load a3e92887d86700b30a3869d0e8c159d7
/etc/apache2/mods-available/authz_owner.load 9ed1ea15654bb594453438154b642539
/etc/apache2/mods-available/proxy_ftp.load c05db1b229a7957f0032c0d79ed7e3c9
/etc/apache2/mods-available/dav_fs.load 17f662fd023dbaaab9d89f9a11ae58c1
/etc/apache2/mods-available/negotiation.load fd7bf44d833446a35f0199d7cbcc9793
/etc/apache2/mods-available/mime.conf
7369c2fd5edf2192edbd6d865b632ae5
/etc/apache2/mods-available/data.load b6cc5b9e815f551335596cd1e25ffc34
/etc/apache2/mods-available/status.load 00976ea5115f286bbc21357581d0b65e
/etc/apache2/mods-available/authz_core.load 90ad8f57655bcd98b7b07864736ab954
/etc/apache2/mods-available/actions.conf 8736884dbc596bcfdbb392409c96fde5
/etc/apache2/mods-available/cgid.load c3ee2eac02c248b5a39fb1a7afee4cb9
/etc/apache2/mods-available/dav.load ed469867552a1145b8c3ffa5780ff83e
/etc/apache2/mods-available/ssl.load 838b292226d2da6ceb3f1c793696ca12
/etc/apache2/mods-available/socache_shmcb.load 9efb84889b8e1683ce104033bf30973d
/etc/apache2/mods-available/deflate.load 6a7a23153796456ee919abdf728fd972
/etc/apache2/mods-available/charset_lite.load 1585fcd1b631c2e9b166e170cb162c54
/etc/apache2/mods-available/proxy_fdpass.load
9e5584db5f748a2fb71b582a255a976e
/etc/apache2/mods-available/socache_memcache.load c0101bc50501b12e7c8c74014560404b
/etc/apache2/mods-available/proxy_scgi.load cb11d685e60db26bbdad456263bf63b7
/etc/apache2/mods-available/cgid.conf e8a2836392051bde889cf9c137058273
/etc/apache2/mods-available/alias.load 7742296502ce1d2f970cc87322d8ffba
/etc/apache2/mods-available/dir.conf fe4bc5fa3b3cc7a241fe57f8fabc55a1
/etc/apache2/mods-available/authnz_ldap.load d65845f053d08b82da239c73c9094c35
/etc/apache2/mods-available/authn_anon.load 03cbe85c698911a3d3235b4855726481
/etc/apache2/mods-available/autoindex.conf bfba7d77669e02b869b92e98215d58fc
/etc/apache2/mods-available/speling.load 095570b0cb18ebdfc357a2241c6932ea
/etc/apache2/mods-available/authz_host.load f529587409471e3feb62256bccaf538a
/etc/apache2/mods-available/allowmethods.load
b377b96eb4dddd88f9428d9cc2fd87ea
/etc/apache2/mods-available/env.load 3e8963a7df7c047be50a552d80a4f853
/etc/apache2/mods-available/proxy_http.load 161b514c355c6daa95f11371fb9c184c
/etc/apache2/mods-available/file_cache.load f097659127628ec6f9c6a558d0baf566
/etc/apache2/mods-available/dbd.load f03fe275174a5ed97b0f5f5726ccea60
/etc/apache2/mods-available/setenvif.load 6f670fad5b6f6b14fa72c9cd3058469b
/etc/apache2/mods-available/ratelimit.load fb40aa030d5458dd99a0c9d1141bcde4
/etc/apache2/mods-available/session.load b552f1e184865c597ae397876fb3a0a6
/etc/apache2/mods-available/proxy_fcgi.load 09cbda44eecbf1cbab48b30045217e3c
/etc/apache2/mods-available/mpm_itk.conf 7183e0b833bcbcb97c9145a5b19dee22
/etc/apache2/mods-available/cache.load ea99aba14e9aa25c27653b9958239a6e
/etc/apache2/mods-available/filter.load
8df0170e37a8925238860657d6c60fe5
/etc/apache2/mods-available/mpm_event.load 0154c968a127164a030f94f06415c7fa
/etc/apache2/mods-available/auth_digest.load f29d047cd59013e2fa6724d677c7970b
/etc/apache2/mods-available/suexec.load 335169c85f4afc14524846789d46af06
/etc/apache2/mods-available/authz_groupfile.load 97a3e14926ce7bf5f2d2a7b93ece648d
/etc/apache2/mods-available/heartmonitor.load b4da13d1c05a7dd1bdeb272300c1fc83
/etc/apache2/mods-available/alias.conf c6e9f26152898c38e58211c8b362d5c3
/etc/apache2/mods-available/usertrack.load 8400042dd4374fad5eedf33ffb3c68f0
/etc/apache2/mods-available/heartbeat.load b78970d35346bfe5eb5817d228cb209c
/etc/apache2/mods-available/actions.load 95dcfd2efdd41666de5f31dd72e01e41
/etc/apache2/mods-available/auth_basic.load a92c34a3ce5e67e2ecbd272155ebe072
/etc/apache2/mods-available/lbmethod_bybusyness.load
094b7c1d424cc4a1dee6f77d301e1888
/etc/apache2/mods-available/authn_file.load ecdeeab8cfec4a9dd0c065a4d6948c31
/etc/apache2/mods-available/socache_dbm.load 9f11810517a6bf2eba31b336ebbfad70
/etc/apache2/mods-available/authz_dbm.load 8cd42e62d8ca0701f9aad080ec968493
/etc/apache2/mods-available/remoteip.load 81a6511c79ab338aef51a6c185152231
/etc/apache2/mods-available/authn_dbm.load 4e37546871dbcba8550a0d781f6fbfa8
/etc/apache2/mods-available/include.load 9cf2fa9ceb6571b5fab4603daad44c83
/etc/apache2/mods-available/deflate.conf 6649a32153b9afdc53f6898b5a10a2d6
/etc/apache2/mods-available/proxy_wstunnel.load d2e5c21b886333f1662fe74591260d5d
/etc/apache2/mods-available/proxy.load 3d3719c88d01152e817f74fc2fd6ce9e
/etc/apache2/mods-available/proxy_ftp.conf dd9beba82c2838bcfd51a05dfb540929
/etc/apache2/mods-available/session_crypto.load
066002be7d8c6c381553dbded41db1b6
/etc/apache2/mods-available/mpm_prefork.conf 26e539a16e51c4feddd2eedc568692e6
/etc/apache2/mods-available/buffer.load ae1e21b4fd2c2e8236ec641cae9814bd
/etc/apache2/mods-available/userdir.conf 143f6c46903d32c98184186e30351dc2
/etc/apache2/mods-available/asis.load d1003c9fa12b4d3ed35ea3827a689492
/etc/apache2/mods-available/request.load 36c1b324cd545e3e29b50b5e2a8357e8
/etc/apache2/mods-available/echo.load 226a145f19c43d9f921c35eacfd61cb2
/etc/apache2/mods-available/proxy.conf b516d96935974214588d525edd7aed6d
/etc/apache2/mods-available/unique_id.load 6c13959015fb35276572070b44e63380
/etc/apache2/mods-available/reqtimeout.load 7fd814775dc3f3c9e6753ef874978f96
/etc/apache2/mods-available/mpm_worker.conf 2673a5a3f030bfb704bee034ce3a183c
/etc/apache2/mods-available/info.conf
4a4aa21e0bb474d420c9a3e1c3320677
/etc/apache2/mods-available/cache_disk.load 56ebd9819aa70a7ff8ac04e4922049f2
/etc/apache2/mods-available/lbmethod_bytraffic.load e656d80b48c020b7d77ece23368e04f1
/etc/apache2/mods-available/dump_io.load 8231c51ef692e0766625ece087484fe4
/etc/apache2/mods-available/proxy_html.load 9ac792bda6e69b4c80af1588289d3a9a
/etc/apache2/mods-available/authz_user.load bcf988f105564ec1e14b78df56a01cd8
/etc/apache2/mods-available/rewrite.load 55e18fb7df64c8f390904b972637c17d
/etc/apache2/mods-available/mpm_prefork.load 0f21070c4b75e105fea74c6a9681eb68
/etc/apache2/mods-available/slotmem_shm.load 127df94eaf6987ad67b964f01eec3251
/etc/apache2/mods-available/userdir.load c034025405561ea48fbcb67fd1998f4d
/etc/apache2/mods-available/lua.load 5e445ce688a49e0a1fcfcaa414fe21f9
/etc/apache2/mods-available/xml2enc.load
1f7ab653ed3601bd265871cdf252a224
/etc/apache2/mods-available/substitute.load 50e63dc17612e22484a88f537e8aec8e
/etc/apache2/mods-available/mime_magic.load ab5c69aa0c91f11157e9bfc4972f8cce
/etc/apache2/mods-available/negotiation.conf 443398efdd41085bc1a70047f6e61c95
/etc/apache2/mods-available/authn_socache.load 260e21e1eb5caa7bcabe8a2fae11445f
/etc/apache2/mods-available/ssl.conf 9e1142f168f9ed891224ebc7116a5135
/etc/apache2/mods-available/cache_socache.load 4b548216cee2e910e9059e426f81e60c
/etc/apache2/mods-available/vhost_alias.load fdd42d34966c329cdee2435dfe72ee24
/etc/apache2/mods-available/ldap.conf 344968a263507c1991a160427e51ed9c
/etc/apache2/mods-available/cgi.load 32a1c48f0e29feb415c9460378728d82
/etc/apache2/mods-available/reqtimeout.conf 40b45155afb3d14263d12e6fc4a98513
/etc/apache2/mods-available/mpm_itk.load
4e3c3370a9ca86b9ef57ce2c63b3a131
/etc/apache2/mods-available/ext_filter.load d3c4acfca1322274a9a8504e8cef27e9
/etc/apache2/mods-available/auth_form.load 731420a769dd8ad537d68bfdbdd6a506
/etc/apache2/mods-available/dialup.load dbc3535a9e5dfd799cf16b5c0d58f137
/etc/apache2/mods-available/proxy_connect.load 6bc4b5de977f70a0b6ae98ab04383c0c
/etc/apache2/mods-available/cache_disk.conf b716cf836c9f00dae0366a39f511b76d
/etc/apache2/mods-available/session_dbd.load cf86e56f8ee26f5dccc39c2f690d7f79
/etc/apache2/mods-available/macro.load 40e0509b4b2d307cdfe4de75fa89dc91
/etc/apache2/conf-available/localized-error-pages.conf cfd0ae5e448102514efe8b97181d19c9
/etc/apache2/conf-available/security.conf 128cf66210a4811990ec72390e66c541
/etc/apache2/conf-available/other-vhosts-access-log.conf 60d5d57995317aedb02bd2a20b366717
/etc/apache2/conf-available/serve-cgi-bin.conf
2292c9cf3cfb05e5b71d726b6c9492f5
/etc/apache2/conf-available/charset.conf 46ea15bcd82c11ea0973aa8842b1dc56
/etc/apache2/magic a6d370833a02f53db6a0a30800704994
/etc/apache2/sites-available/000-default.conf 7aca057d3c02f05f0188896e563edd4a
/etc/apache2/sites-available/default-ssl.conf e8944838a01a71ed1d0c4de4b8d11649
/etc/apache2/apache2.conf da32fcc6a783acaebf0d74c17c726bf7
/etc/bash_completion.d/apache2 299fbd0f893c33c46e9fe2d66d8c8235
/etc/default/apache2 b8c9d2272f8df519b2704e3d147316c1
This is a fairly
old install that has been upgraded over time; I did go through the apache 2.2 -> 2.4 process for example.
mod-enabled is:
access_compat.load
alias.conf
alias.load
authn_core.load
authz_core.load
autoindex.conf
autoindex.load
cgi.load
dir.conf
dir.load
env.load
filter.load
geoip.conf
geoip.load
mime.conf
mime.load
mpm_prefork.conf
mpm_prefork.load
php5.conf
php5.load
rewrite.load
userdir.conf
userdir.load
I will try to reproduce in a clean chroot as well; and import my config as well.