Description of problem:
During an RPM upgrade transaction multiple components (such as httpd itself, any module package, any web app with a configuration changes) may be updated which require a restart of httpd to take effect.  Currently these can only manually trigger an httpd reload per-component.

Version-Release number of selected component (if applicable):
any

Proposals:

1. for httpd add a file trigger such as:

%transfiletriggerin -- /usr/sbin/httpd /etc/httpd/conf.d  \
   /etc/httpd/conf.modules.d /usr/lib64/httpd/modules

2. Possibly define some %_httpd_auto_reload in macros.httpd, so webapp packaging can detect an httpd which supports this (and drop manual reload in %post)

Is this sufficient?