New ftp/http/https proxy setting code. BZ 769254, BZ 574080.
New ftp/http/https proxy setting code. BZ 769254, BZ 574080.

- FTP: compare strings instead of substring matching.
- HTTP/HTTPS: prefer the correct proxy string.
- PROXYAUTH set to HTTPAUTH_ANY, allowing NTLM auth.

oe-lite/urlgrabber,henrysher/urlgrabber,henrysher/urlgrabber,oe-lite/urlgrabber,tradej/urlgrabber,oe-lite/urlgrabber,Distrotech/urlgrabber,oe-lite/urlgrabber,henrysher/urlgrabber,Distrotech/urlgrabber,tradej/urlgrabber,tradej/urlgrabber,Distrotech/urlgrabber,Distrotech/urlgrabber,henrysher/urlgrabber