Various mod_perl handlers should accept eg2's auth token

[Galen Charlton]

The Apache authentication handler OpenILS::WWW::Proxy::Authen and other mod_perl handlers (e.g., for bib export) currently expect that the authentication session will be passed to it only via a 'ses' URL parameter or a 'ses' cookie. However, it should also be taught to accept the web-based staff client's eg.auth.token cookie.

That way, any resources that are guarded by the OpenILS::WWW::Proxy::Authen handler (such as print overdue notices or a direct link to reporter output) can be directly used if the user has already logged in to the staff client. Ditto for resources (other than TPAC) that have their own Perl handlers.

[Galen Charlton (gmc)]

A patch is available at user/gmcharlt/lp1996908_proxy_authen_accepts_eg.auth.token / https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/gmcharlt/lp1996908_proxy_authen_accepts_eg.auth.token

[Mike Rylander (mrylander)]

I've signed off Galen's commit above, and expanded the eg.auth.token support to other legacy mod_perl handlers as well, ommiting the OPAC via EGCatLoader. Branch at:

https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/miker/lp1996908_legacy_handlers_accept_eg.auth.token

[Jason Boyer (jboyer)]

The thing on the tin is done within, pushed to master -> rel_3_9; thanks Galen and Mike!