apache2: Add some extra modules

 - mod_authnz_ldap
 - mod_headers
 - mod_ldap
 - mod_proxy
 - mod_python
 - mod_socache_shmcb
 - mod_ssl
 - mod_version

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
apache2: Add basic 14.04 support

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
apache2: Add ports.conf

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
ssh: Bump ServerKeyBits to 1024

This puts the value in line with the default for 14.04.

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>