wininet: ros-diff causes use after free in open_http_connection

Created an attachment (id=8077)
Move server_release calls

open_http_connection in dll\win32\wininet\http.c calls server_release (which in our implementation frees the server instantly) and then goes on to use the server pointer.
This is correct with Wine's implementation (which uses a delayed free) AFAICT, but conflicts with our diff from r54263 ([WININET] - Disable connection keep-alive to avoid calling into msafd to close the connection later during DLL_PROCESS_DETACH).

The ros-diff should probably be updated to also move the server_release call to a later point (-> patch). But this is rather ugly - perhaps there's a nicer solution?

Found by Coverity - CID 716799.