Make hg serve set the wsgi.url_scheme property correctly.

This fixes the bug where hg serve with SSL will always detect the wrong
urlbase for templates. This is also part of unifying the CGI interface
and hg serve interface to both use standard wsgi.

mercurial/hgweb/server.py

@@ -37,6 +37,9 b' class _error_logger(object):'
             self.handler.log_error("HG error:  %s", msg)
 
 class _hgwebhandler(object, BaseHTTPServer.BaseHTTPRequestHandler):
+
+    url_scheme = 'http'
+    
     def __init__(self, *args, **kargs):
         self.protocol_version = 'HTTP/1.1'
         BaseHTTPServer.BaseHTTPRequestHandler.__init__(self, *args, **kargs)
@@ -104,7 +107,7 b' class _hgwebhandler(object, BaseHTTPServ'
                 env[hkey] = hval
         env['SERVER_PROTOCOL'] = self.request_version
         env['wsgi.version'] = (1, 0)
-        env['wsgi.url_scheme'] = 'http'
+        env['wsgi.url_scheme'] = type(self).url_scheme
         env['wsgi.input'] = self.rfile
         env['wsgi.errors'] = _error_logger(self)
         env['wsgi.multithread'] = isinstance(self.server,
@@ -168,6 +171,9 b' class _hgwebhandler(object, BaseHTTPServ'
         self.wfile.flush()
 
 class _shgwebhandler(_hgwebhandler):
+
+    url_scheme = 'https'
+    
     def setup(self):
         self.connection = self.request
         self.rfile = socket._fileobject(self.request, "rb", self.rbufsize)