Fix #33 - parse config as described by manpage

(cherry picked from commit 011805eae07ee7be6140b95f6d8669763c55b3d9)

paramiko/config.py

@@ -104,11 +104,16 @@ class SSHConfig (object):
         @type hostname: str
         """
         matches = [x for x in self._config if fnmatch.fnmatch(hostname, x['host'])]
-        # sort in order of shortest match (usually '*') to longest
-        matches.sort(lambda x,y: cmp(len(x['host']), len(y['host'])))
+        # Move * to the end
+        _star = matches[0]
+        del matches[0]
+        matches.append(_star)
+        ret = {}
         ret = {}
         for m in matches:
-            ret.update(m)
+            for k,v in m.iteritems():
+                if not k in ret:
+                    ret[k] = v
         ret = self._expand_variables(ret, hostname)
         del ret['host']
         return ret

tests/test_util.py

@@ -159,3 +159,21 @@ class UtilTest (unittest.TestCase):
         x = rng.read(32)
         self.assertEquals(len(x), 32)
         
+    def test_7_host_config_expose_issue_33(self):
+        test_config_file = """
+Host www13.*
+    Port 22
+
+Host *.example.com
+    Port 2222
+
+Host *
+    Port 3333
+    """
+        f = cStringIO.StringIO(test_config_file)
+        config = ssh.util.parse_ssh_config(f)
+        host = 'www13.example.com'
+        self.assertEquals(
+            ssh.util.lookup_ssh_host_config(host, config),
+            {'hostname': host, 'port': '22'}
+        )