don't require mod_perl as an OpenSRF dependency

[Galen Charlton]

As a historical accident of the process of splitting OpenSRF out from the Evergreen code base, mod_perl is installed during the OpenSRF installation process, not Evergreen's.

This is a bit untidy as OpenSRF proper includes no mod_perl handlers. It does include one check of the MOD_PERL environment variable, but that doesn't require that mod_perl itself be installed.

Consequently, mod_perl should be listed as an *Evergreen* dependency, not an OpenSRF one.

[Galen Charlton (gmc)]

A patch implementing the Evergreen side of it is available at the tip of the user/gmcharlt/lp1579219_move_mod_perl_dep_to_eg branch:

http://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/gmcharlt/lp1579219_move_mod_perl_dep_to_eg

[Galen Charlton (gmc)]

And the OpenSRF side is available in the user/gmcharlt/lp1579219_move_mod_perl_dep_from_osrf branch:

http://git.evergreen-ils.org/?p=working/OpenSRF.git;a=shortlog;h=refs/heads/user/gmcharlt/lp1579219_move_mod_perl_dep_from_osrf

[Ben Shum (bshum)]

Tested successfully on Debian Jessie and Ubuntu Trusty. With moving the installation of mod_perl over to the Evergreen side of things, we also bypass the issue uncovered with bug 1585042. Will favor this fix over the ones proposed over there.

I didn't sign off or push anything, but basically this is ready to go in whenever gmcharlt is ready to finish juggling pieces for OpenSRF 2.5-alpha.

In case I don't get to push it myself... I have tested this code and consent to signing off on it with my name, Ben Shum and my email address, <email address hidden>.

[Ben Shum (bshum)]

Bringing this one back to the forefront as needed now that we're making OpenSRF 2.5.0 a reality. Need to push both the OpenSRF side to remove mod-perl dependency and also add to Evergreen side the pieces needed.

Retargeting Evergreen side to 2.12-rc for inclusion.

[Ben Shum (bshum)]

Based on conversation with Galen on original patch idea, going ahead and making mod_perl a core dependency that's installed on Evergreen side of things, and also making sure to enable perl via the apache mods list.

Pushed to Evergreen master for 2.12.

Holding off on the removal of mod_perl from OpenSRF side for now. We can always choose to remove it in a future release series of OpenSRF. Even if we end up checking to install it in both Evergreen and OpenSRF, we're very safe in making sure that mod_perl is installed and activated either way.