MFC r266728,266731,266735,266736,268135,268960,269833 Update apr 1.4.8 -> 1.5.1 Update apr-util 1.5.2 -> 1.5.3 Update serf 1.3.4 -> 1.3.7 Update svnlite 1.8.8 -> 1.8.10 Deal with svnlite.1 manpage.
Merge apr-1.4.8 -> apr-1.5.1 and update.
Vendor import apr-1.5.1