Default to 10 threads instead of 100.

doc/changelog.txt

@@ -35,6 +35,7 @@ Changes:
   Closes: GH bug #424
 - checking: Disable twill page refreshing.
   Closes: GH bug #423
+- checking: The default number of checking threads is 10 now instead of 100.
 
 Fixes:
 - logging: Status was printed every second regardless of the

linkcheck/configuration/__init__.py

@@ -145,7 +145,7 @@ class Configuration (dict):
         self["nntpserver"] = os.environ.get("NNTP_SERVER", None)
         self["proxy"] = urllib.getproxies()
         self["sslverify"] = True
-        self["threads"] = 100
+        self["threads"] = 10
         self["timeout"] = 60
         self["aborttimeout"] = 300
         self["recursionlevel"] = -1