Commit Briefs
delete 9P2000.u
thanks to Erik Quanstrom R=rsc http://codereview.appspot.com/3469042
lib9: dotu fixes in convS2M, convM2S
http://codereview.appspot.com/109049
Change GET/GBIT32 macros to explicitly cast final result to u32int.
Otherwise, the type of the expression will be int, and if written to a uvlong (or just a ulong on most 64-bit systems), it will be sign-extended. This was going on in drawfcall with Mouse.msec, which is declared as a ulong. This fix assumes that the protocols only send unsigned numbers, which is true.
Add the #goo to allow use in C++.
Silence a few more warnings. Strip down the mkfiles more. Fix bug in X11 mouse handling, note groups.