Some problems in banlist.c are fixed
Fix autotools warning
win32: Silent installer improvements

- Launch uninstaller as VERYSILENT
- Don't launch Python/Perl installers when silent
Update server list

Closes #1013
configure: Improve python logic

- add checks for python3.4
- only warn once for failure to find a version
- only run pkg-config call if the .pc file was actually found
- make unsupported python version non-fatal

Closes #1006
Closes #989