Backport of r1629235:
mod_example_hooks: Fix some comments and log messages: module was
renamed form mod_example to mod_example_hooks long ago.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1629259 13f79535-47bb-0310-9956-ffa450edef68