Log Message:
py-mechanize: update to 0.4.4.

2019-11-07 Kovid Goyal
	* 0.4.4 release
	* URLs passed into mechanize now automatically have URL unsafe characters
	percent encoded. This is necessary because newer versions of python
	disallow processing of URLs with unsafe characters. Note that this means
	values return by get_full_url(), get_selector() etc will be percent encoded.