Bug#913823: apache2: dav.load does not check for an already loaded dav_module

[Stefan Fritsch <sf@sfritsch.de>]

On Friday, 1 February 2019 03:49:22 CEST Nye Liu wrote:
> Package: apache2
> Version: 2.4.38-1
> Followup-For: Bug #913823
> 
> Workaround in /etc/apache2/mods-available/dav.load:
> 
> <IfModule !mod_dav.c>
>     LoadModule dav_module /usr/lib/apache2/modules/mod_dav.so
> </IfModule>
> 
> Alternately just make dav_fs not depend on dav, it will autoload it.

This does not make sense. There is no functionality in mod_dav_fs that would 
autoload mod_dav. The "# Depends: dav" in dav_fs.load is a hint to a2enmod to 
enable dav.load, too. But this is visible by a symlink in mods-enabled. There 
must be another LoadModule somewhere else in your configuration.

You should probably do

grep -R dav_module /etc/apache2/{*.conf,*-enabled}

to find it.