instaweb: fix ip binding for the python http.server

`git instaweb -d python` should bind the server to 0.0.0.0, while
`git instaweb -d python -l` should bind the server to 127.0.0.1.

The code had them backwards by mistake since 2eb14bb
(git-instaweb: add Python builtin http.server support, 2019-01-28).

Signed-off-by: Alecs King <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: int

git-instaweb.sh

@@ -694,9 +694,9 @@ class GitWebRequestHandler(CGIHTTPRequestHandler):
 		return result
 
 
-bind = "127.0.0.1"
+bind = "0.0.0.0"
 if "$local" == "true":
-	bind = "0.0.0.0"
+	bind = "127.0.0.1"
 
 # Set our http root directory
 # This is a work around for a missing directory argument in older Python versions