Include mod_authn_alias in default Apache2 build

[markphip@…]

The Apache2 port does not build the mod_authn_alias module. The configure output contains:

checking whether to enable mod_authn_alias... no

The Ubuntu build process specifies:

--enable-authn-alias=shared

I suspect there is a bug in upsteam Apache2 build process where this directive does not include this module:

--enable-mods-shared=all

Blair Zajac helped me on IRC and suggested I file a ticket