mail: add parseaddrlist() function for parsing many addresses at once Adds a new function addrlistencode() to mercurial.mail, like addressencode(), but accepts a list of addresses as input, and returns a list of formatted addresses. This will be used by patchbomb. The difference is that each element in the input list can contain multiple addresses (comma separated or otherwise), and are split using Python's email.Utils.getaddresses().