Log Message:
Assorted fixes:
 - explain why we need post-extract chmods
 - sort PLIST
 - add patch comments
 - clean up some pkglint
 - fix a symbol name conflict with logf (from math.h + a gcc builtin)
 - fix some other bugs/issues found by gcc
 - add standard headers
 - remove some bogus BSD/System V include probing
 - probably fix gcc 4.5 build (not fully tested)
 - bump PKGREVISION