notify: cleanup module docstring

convert: fix inconsistent indentation in help text The sort modes flags and convert.cvsps options were indented while the convert.hg, convert.svn, and convert.p4 options were not. I've now un-indented all of them.

Merge with stable

filectx: add a hex method

win32mbcs: also wrap windows.pconvert()

Use os.path.split() for MBCS with win32mbcs extension.

win32mbcs: look up modules using sys.modules (issue1729) globals()[module] doesn't work for modules inside of packages, such as os.path.

fix memory usage of revlog caches by limiting cache size [issue1639]