[0/6] support ProxyOverride in wininet

[Daniel Lehman]

This series adds support for ProxyOverride settings, with the option of setting no_proxy in the environment

0001 - Fetching ParseOverride is most a copy of ProxyServer parsing, and is done only if proxy is enabled
0002 - only copy the given proxy and proxyBypass if the type is OPEN_TYPE_PROXY (msdn says ignore them if type is anything else)
0003 - glue to pass proxyBypass
0004 - The parsing of ParseOverride is copied from winhttp, with tweaks to match the style of the wininet code
0005 - remove FIXME about not supporting ParseOverride
0006 - Fix memory leak of proxy and proxyBypass strings

The big thing missing is standalone Wine tests.  Is there a working proxy server I can write tests against?  Seemed like the existing tests either use localhost, which won't test the parsing well, or use a dummy proxy server name to set/get.  If there is one and I missed it, I'll rework these with tests and resubmit

Thanks
daniel