Merge r1824176, r1824460, r1824482 from trunk:

mod_proxy: Provide an RFC1035 compliant version of the hostname in the
proxy_worker_shared structure. PR62085


Tone down the message that worker hostname is too long noting it only
affects legacy modules not yet using hostname_ex.


Set the notice when hostname is too long for legacy proxy modules to info level.


Submitted by: minfrin
Reviewed by: minfrin, jim, ylavic


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1824504 13f79535-47bb-0310-9956-ffa450edef68