Add symlink method to util.opener. Differences from os.symlink: - the symlink name is relative to the opener base directory - if a file with that name already exists, it's removed - if necessary, parent directories are created - if the system (OS or filesystem) doesn't support symlinks, a regular file is created. Its contents are the symlink target.

marked working directory as branch abranch
applying patch from stdin
applying patch from stdin
applying patch from stdin
applying patch from stdin