Add patch to remove indirect openssl dependency from Windows build.

docs/build_mingw_windows.txt

@@ -11,7 +11,11 @@ on your Linux system.
 (if this does not work, as some packages might be broken, try the latest development release:
 hg clone http://hg.savannah.nongnu.org/hgweb/mingw-cross-env mingw )
 
-3. Within /opt/mingw, run
+3. Patch OpenSSL dependencies out of Qt build file (OpenSSL license is not compatible with the GPL)
+Within /opt/mingw, run
+patch -p1 < /path/to/pokerth/docs/win32_rm_openssl.diff
+
+4. Within /opt/mingw, run
 make gcc
 make qt
 make boost
@@ -21,17 +25,17 @@ make sdl_mixer
 make tinyxml
 (this takes quite some time)
 
-4. As the user you would like to use to compile PokerTH for Windows,
+5. As the user you would like to use to compile PokerTH for Windows,
 add the cross compiler to your path; e.g.:
 PATH="/opt/mingw/usr/bin:$PATH"
 (in .profile)
 Alternatively, run
 export PATH="/opt/mingw/usr/bin:$PATH"
 
-5. Download and extract whichever source version of PokerTH you wish to compile.
+6. Download and extract whichever source version of PokerTH you wish to compile.
 http://pokerth.net/download.html
 
-6. Within the pokerth directory, run
+7. Within the pokerth directory, run
 i686-pc-mingw32-qmake DEFINES+=BOOST_THREAD_USE_LIB pokerth.pro
 make release