posix: fix findexe() to check for file type and access

forget: use forward slashes for internal paths forget into a subrepo failed on windows because pathes were joined with \.

check-code: add --nolineno option for hiding line numbers This makes the output more stable when it is used as a whitelist.

merge: give a special message for internal:merge failure (issue3105)

setup: raise when executing with python3 without c2to3 argument

posix: fix findexe() to check for file type and access

subrepo: use correct paths for subrepos with ..-relative paths on windows posixpath normpath of c:\foo\bar/../baz is baz, so now we pconvert first.

add missing localization markup

url: handle file://localhost/c:/foo "correctly" The path was parsed correctly, but localpath prepended an extra '/' (as in '/c:/foo') because it assumed it was an absolute unix path.

help: it is 'file://localhost/', not 'file://local/' The documentation has apparently always been wrong.

setup: support executing with python3 including 2to3 Merge the code from contrib/setup3.py in setup. The argument for executing is marked as experimental. Reason: The file in contrib was outdated (packages, cmdclass, ...)

setup: hgbuildmo inherits from Command hgbuildmo does not need anything provided by the build class.