fix(pycurl): report nicer error log on failed calls in pycurl

rhodecode/lib/vcs/__init__.py

@@ -136,7 +136,12 b' class CurlSession(object):'
         curl.setopt(curl.FOLLOWLOCATION, allow_redirects)
         curl.setopt(curl.WRITEDATA, response_buffer)
         curl.setopt(curl.HTTPHEADER, headers_list)
-        curl.perform()
+
+        try:
+            curl.perform()
+        except pycurl.error as exc:
+            log.error('Failed to call endpoint url: {} using pycurl'.format(url))
+            raise
 
         status_code = curl.getinfo(pycurl.HTTP_CODE)
         content_type = curl.getinfo(pycurl.CONTENT_TYPE)