test-histedit: add tests for dropping head changeset I got bug report from user in this specific case. I was unable to reproduce in test situation. Testing this situation is still valuable.

tests: use `pwd` instead of ${PWD} in test-convert-git.t - because of Solaris

histedit: prevent parent guessed via --outgoing from being a revset (issue3770) If the binary hash of the parent node guessed via --outgoing happened to contain a special revset character (":" was specified in the bug), the revset parser would abort. Hexlifying the node before passing it to the revsingle call should fix that.

tests: fix for windows - slashes and no serve

merge: fix UnboundLocalError (issue3791) A wrong variable name was introduced in 384df4db6520 for a case without test coverage. The variable name is fixed and a test case is introduced.

parsers: fix memleak of revlog cache entries on strip Since 12a852c7c763, raw_length can be reduced on strip, but corresponding cache entries still have refcount. They are not dereferenced by _index_clearcache(), and never freed. To reproduce the problem, run "hg pull" and "hg strip null" several times in the same process.