osutil: use fdopendir instead of dirfd

convert: svn -- fix tags handling They were simply not detected.

convert: svn -- fix 'exists' Previously 'exists' erroneously returned False for empty dirictories. This is wrong since we want to detect even empty 'branches/' or 'tags/'.

merge with goto

mpatch: Define Py_ssize_t for old pythons and use it instead of ssize_t. See also PEP 353. NOTE: Microsoft compilers (8 or earlier) does not have ssize_t.

mpatch: use int rather than ssize_t We might need to be more clever than this to make Py2.5 happy.

osutil: improve portability - manually inline mode_to_kind - remove unused alloca include - remove fstatat and associated bits It's not obvious that there's an advantage to using fstatat in terms of performance. The race-avoidance properties of fstatat aren't terribly useful to us either. So best to avoid it until we figure out how to use it portably.

fix typo

import gettext since '_' is used

explicitely use integer division