backout most of 4f8067c94729

incoming/outgoing: Fix recursion on sub repositories Incoming and outgoing are fixed so they go through the whole three of repositories instead of only visiting first level of sub repositories.

tests: added a short description to issue numbers Many tests already had a short line to describe what IssueXXX is about. I find that quite useful when reading a test.

merge with stable

test-gendoc: mute gendoc stderr Solaris had problems with zh_CN and warned "couldn't set locale correctly" on stderr. We don't care.

test-mq-symlinks: fix symlink handling on solaris It seems like ln -s gets confused if an existing symlink is dangling: $ rm -f a b; ln -s a b; ln -sf b b ln: cannot create b: File exists We now rely on rm instead of on ln -sf.

test-archive: fix touch datestamps Backport 3acd5f7ab9d0 and 9581d5efb6a5 to stable.

Merge with stable

convert/darcs: improve unsupported format detection (issue2172)

bookmarks: fix _bookmarks/lookup() reentrancy issue (issue2016) _bookmarks is loaded lazily and calls super.lookup(). Unfortunately, branch and tags caches initializations also recurse in lookup() and end up trying to access _bookmarks again. Massive confusion ensues. I considered fixing all branches and tags cache loading to avoid recursing in lookup() but it would add complexity to otherwise working code provided lookups are performed on nodes or revnums.