httpd 2.4 is coming, RFC on module packaging draft

[Joe Orton]

httpd 2.4.1 packages are ready for dist-f18 and will be built early next 
week.  Rebuilds will be required for all packages containing httpd 
modules.  There are API changes in 2.4, so module packages may need 
patches if upstream has not done that work already:

http://httpd.apache.org/docs/2.4/developer/new_api_2_4.html

There are some significant changes in the packaging, also:

1) Config changes: I've moved to a minimal default httpd.conf which is 
very close to what we're shipping upstream.

a) I'm proposing to split out packaged config snippets from mutable 
config, with the former in /etc/httpd/conf.modules.d/, containing only 
LoadModule lines, and ordered to avoid load-ordering issues.

b) /etc/httpd/conf.d/*.conf should contain no LoadModules for packaged 
modules, and only any reasonable default configurations.

2) Loadable MPMs!  MPMs are now loadable modules, so we only need to 
ship one httpd binary again.  Changing MPM is a config tweak.

3) Content.  Putting unmutable content in /var was bad practice, so I've 
moved the /var/www/manual and /var/www/icons to into /usr/share/httpd.  
We now ship /var/www/* as empty directories.

4) Filesystem locations have moved in-line with upstream, e.g. apxs is 
now in /usr/bin.  /etc/rpm/httpd.macros has macros for everything module 
packages should need.

Since much of the above requires packaging changes for module packages, 
I've prepared a draft packaging guideline to document best practice:

https://fedoraproject.org/wiki/PackagingDrafts/ApacheHTTPModules

If anything there looks stupid, needs fixing, is missing, or there's any 
other feedback, please shout!

Regards, Joe