convert: accept Subversion 'file:///c%3A/svnrepo' syntax on Windows
Subversion can handle ':' quoted as '%3A' but urllib.url2pathname can't and
Mercurial thus rejected some valid subversions URLs.
This particular case will now be handled by some preprocessing before handing
it over to urllib.url2pathname.
This is tested by 0413f68da85c when test-convert-svn-source.t and
test-convert-svn-move.t can be run on Windows.
Mercurial's documentation is kept in reStructuredText format, which is
a simple plain text format that's easy to read and edit:
http://docutils.sourceforge.net/rst.html
It's also convertible to a variety of other formats including standard
UNIX man page format and HTML. You'll need to install Docutils:
http://docutils.sourceforge.net/
Use the Makefile in this directory to generate the man and HTML pages.