Use platform-appropriate rc file names.

mercurial/ui.py

@@ -14,8 +14,7 b' class ui:'
                  interactive=True):
         self.overlay = {}
         self.cdata = ConfigParser.SafeConfigParser()
-        self.cdata.read([os.path.normpath(hgrc) for hgrc in
-                         "/etc/mercurial/hgrc", os.path.expanduser("~/.hgrc")])
+        self.cdata.read(util.rcpath)
 
         self.quiet = self.configbool("ui", "quiet")
         self.verbose = self.configbool("ui", "verbose")

mercurial/util.py

@@ -45,7 +45,7 b' def patch(strip, patchname, ui):'
     if code:
         raise Abort("patch command failed: exit status %s " % code)
     return files.keys()
-    
+
 def binary(s):
     """return true if a string is binary data using diff's heuristic"""
     if s and '\0' in s[:4096]:
@@ -331,6 +331,9 b' else:'
 if os.name == 'nt':
     nulldev = 'NUL:'
 
+    rcpath = (r'c:\mercurial\mercurial.ini',
+              os.path.join(os.path.expanduser('~'), 'mercurial.ini'))
+
     def parse_patch_output(output_line):
         """parses the output produced by patch and returns the file name"""
         pf = output_line[14:]
@@ -383,6 +386,9 b" if os.name == 'nt':"
 else:
     nulldev = '/dev/null'
 
+    rcpath = map(os.path.normpath,
+                 ('/etc/mercurial/hgrc', os.path.expanduser('~/.hgrc')))
+
     def parse_patch_output(output_line):
         """parses the output produced by patch and returns the file name"""
         return output_line[14:]