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.