backports minor fixes

Merge r635137 from trunk:
Pet peeve: fix capitalisation of 'Require' directive

Merge r450473 from trunk:
Minor typo


Merge r545834 from trunk:
Fix a typo, as per PR 40447.

Submitted by Tony Stevenson.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@655823 13f79535-47bb-0310-9956-ffa450edef68