Commit Briefs
build: OS X 64-bit build
R=rsc http://codereview.appspot.com/4838047
9a: fix OS X PowerPC build
http://codereview.appspot.com/117065
INSTALL: fix build on Snow Leopard
http://codereview.appspot.com/116073
various shell script fixes.
add 9a, 9c, 9l wrapper scripts. label sets label on xterm/9term