Spell the C compiler CCPATH as CC gets the wrapper threatment and might
not exist at this point yet.
Update to 2.7.1. WhatsNew page on wiki is overrun by spambots, so
no list of changes available.
Updated devel/mercurial to 2.7.1
Include libiconv.  Fixes build on SunOS.
recursive bump from graphics/gd shlib major bump.