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Bug#821229: AddCharset config should state more clearly which documentation to read

Package: apache2
Version: 2.4.10-10+deb8u4
Severity: wishlist

/etc/apache2/conf-available/charset.conf currently says:

# Read the documentation before enabling AddDefaultCharset.
# In general, it is only a good idea if you know that all your files
# have this encoding. It will override any encoding given in the files
# in meta http-equiv or xml encoding tags.

#AddDefaultCharset UTF-8

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet

It's been a while since I looked at that setting. From memory, I
*think* there's a security issue with enabling this setting, but the
comment does not make that clear at all. Furthermore, it doesn't say
*why* I should read the documentation, or worse, which. I don't have a
README.Debian installed here.

The Apache documentation upstream is pretty large. I could find this:


Which links to:


Then that links to:


... when do I stop reading? :) What exactly is the point of the notice?

I would suggest adding a recommendation in the text explicitly stating
that the user should read the issues documented in the
AddDefaultCharset documentation with the URL, that way it's clear that
the user does not need to get familiar with all the details of content
negotiation and IANA numbering. :p

It's also unclear to me why there's a config in conf-enabled that does
nothing by default. It would seem to me more rational to have the
config disabled by default, but then have AddDefaultCharset
actually activated in there...


-- System Information:
Debian Release: 8.4
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'proposed-updates'), (500, 'stable'), (1, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.2.0-0.bpo.1-amd64 (SMP w/2 CPU cores)
Locale: LANG=fr_CA.UTF-8, LC_CTYPE=fr_CA.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages apache2 depends on:
pn  apache2-mpm-worker | apache2-mpm-prefork | apache2-mpm-event | apac  <none>
pn  apache2.2-common                                                     <none>

apache2 recommends no packages.

apache2 suggests no packages.

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