Make WWW::Mechanize#request_headers actually take effect.
Make WWW::Mechanize#request_headers actually take effect.

uksa/mechanize,uksa/mechanize,jeremiahmarks/mechanize,gchan/mechanize,pwnall/mechanize,jedisct1/mechanize,eligoenergy/mechanize,jeremiahmarks/mechanize,gchan/mechanize,sjchakrav/mechanize,sjchakrav/mechanize,eligoenergy/mechanize,bugmelody/mechanize,bugmelody/mechanize,sparklemotion/mechanize,sparklemotion/mechanize,flavorjones/mechanize,pwnall/mechanize