vcsserver: use safer maxfd reporting, some linux systems get a problem with this

vcsserver/http_main.py

@@ -25,6 +25,7 b' import wsgiref.util'
 import traceback
 import tempfile
 import resource
+import psutil
 from itertools import chain
 from cStringIO import StringIO
 
@@ -117,14 +118,21 b' def _string_setting(settings, name, defa'
     return settings[name]
 
 
+def log_max_fd():
+    try:
+        maxfd = psutil.Process().rlimit(psutil.RLIMIT_NOFILE)[1]
+        log.info('Max file descriptors value: %s', maxfd)
+    except Exception:
+        pass
+
+
 class VCS(object):
     def __init__(self, locale_conf=None, cache_config=None):
         self.locale = locale_conf
         self.cache_config = cache_config
         self._configure_locale()
 
-        maxfd = resource.getrlimit(resource.RLIMIT_NOFILE)[1]
-        log.info('Max file descriptors value: %s', maxfd)
+        log_max_fd()
 
         if GitFactory and GitRemote:
             git_factory = GitFactory()