Log Message:
Back-propagate the changes that patch-ac makes to doc/Makefile.in to
doc/Makefile.am. Otherwise, the changes are lost when automake is
rerun, which now (?) happens sometimes (?) during the build. This then
leads to massive PLIST divergence. Bump PKGREVISION in case anyone,
such as perhaps the person who updated it, installed it without
PKG_DEVELOPER set.