Merge the r1640862 group from trunk:

 * r1640862, r1640873, r1643793
   Work with libtool 2.4.3
   Justification:
     libtool 2.4.3 is needed to build properly on OS X 10.10
   Votes:
     +1: philip, brane, breser


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.7.x@1643970 13f79535-47bb-0310-9956-ffa450edef68
Merge r1643810 from trunk:

 * r1643810
   Avoid unneeded memory growth in mod_dav resource walking (issue 4531)
   Justification:
     Some copy operations failed in certain user scenarios, with really huge
     trees.
   Notes:
     This is working around a mod_dav inefficiency in recent 2.2/2.4.
   Votes:
     +1: rhuijben, stsp, philip


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.7.x@1643971 13f79535-47bb-0310-9956-ffa450edef68