Commit Briefs
devdraw: prefer 24-bit over 15-bit or 16-bit.
Fixes remote X11 use via XQuartz 2.7.4. R=rsc http://codereview.appspot.com/6624058
In non-blocking recv functions in libmux and libdraw,
distinguish between "cannot receive without blocking" and "EOF on connection". In libmux, do not elect async guys muxers, so that synchronous RPC calls run in the main event loop (e.g., in eresized) do not get stuck. Fixes problem reported by Lu Xuxiao, namely that jpg etc. would spin at 100% cpu usage.