ui: look before you leap on sys.stderr.closed (and look nicer) f83291e5643e introduced a fix if sys.stdout.closed does not exist. This change uses a getattr with default instead of hasattr (which just calls getattr) and accessing the attribute. Additionally it applies the same fix for sys.stderr.closed as this is not available in the bpython shell (reported by Roger Gammans).

Merge with stable

hgrc: update docs for the server section

localrepo: add optional validation (defaults to off) for incoming changes This verifies that all manifests are present for incoming changes, and all files for those manifests are also present. This is a simple first-pass, and could be better, but seems like a valuable thing to have, as I've seen pushes in the past that propagated revlog corruption.

branch: avoid using reserved tag names Reported as Debian bug #552423.

doc: add missing documentation for http_proxy.always

url: proxy handling, simplify and correctly deal with IPv6 Thanks to Henrik for testing.