fix for extra back slashes for windows UNC paths

Author: HudsonMC16

git/config.py

@@ -419,6 +419,8 @@ def string_decode(v):
                         optval = string_decode(optval[1:])
                     # end handle multi-line
                     # preserves multiple values for duplicate optnames
+                    # fix for extra back slashes so windows UNC paths are not mangled
+                    optval = optval.replace('\\\\', '\\')
                     cursect.add(optname, optval)
                 else:
                     # check if it's an option with no value - it's just ignored by git