In MacOS 10.8, the NSBitmapImageRep class appears to cache the specified image data at the time of construction. As a result updates to the backing memimage object do not get pushed to the screen in flushimg. This patch creates the NSBitmapImageRep object over again for each flushimg which would appear to fix the problem. R=rsc CC=plan9port.codebot http://codereview.appspot.com/6443063

Don't call vtlog() when _vtqrecv() returns nil on queue hangup, as reported on http://bitbucket.org/rsc/plan9port/issue/102/ R=rsc http://codereview.appspot.com/6373046

R=rsc, rsc http://codereview.appspot.com/6405057

R=rsc http://codereview.appspot.com/6402049

R=rsc http://codereview.appspot.com/6401049

R=rsc http://codereview.appspot.com/6395048

R=rsc http://codereview.appspot.com/6395047

R=rsc http://codereview.appspot.com/6402044

R=rsc http://codereview.appspot.com/6396045

R=rsc http://codereview.appspot.com/6397046

Fix build error and warning on OpenBSD 5.1, as reported by Dimitri Sokolyuk. R=rsc http://codereview.appspot.com/6350044

The function p9dialparse() returns the host as a sockaddr_storage structure instead of a u32int, to be able to handle both IPv4 and IPv6 addresses. Because the sockaddr_storage structure also handle port numbers and Unix path names, there is no longer need to set them in the calling functions. However, these values are still returned for convenience. The sockaddr_in and sockaddr_un structures have been replaced by sockaddr_storage to handle Unix, IPv4 and IPv6 sockets. Names and addresses are resolved using either gethostbyname() or getaddrinfo() functions. The getaddrinfo() function is documented in RFC2553 and standardized since POSIX.1-2001. It supports both IPv4 and IPv6 addresses. The gethostbyname() function is deprecated since POSIX.1-2008. However, some libc implementations don't handle getaddrinfo() properly, thus we preferred to try gethostbyname() first. I've tried to preserve most of the old code logic to prevent from surprising or unwanted behavior. R=rsc http://codereview.appspot.com/6255068

R=rsc http://codereview.appspot.com/6258060

R=rsc http://codereview.appspot.com/6258059

R=rsc, adkulkar CC=plan9port.codebot http://codereview.appspot.com/6108047