Don't resynchronize parsers when the plugin is activated. Since the plugin was inactive, it would be impossible for any containers to have been synchronized without the parsers' knowledge.
 
 Also add even more performance logging. Most of it goes into stuff that triggers upon activation.

git-svn-id: https://plugins.svn.wordpress.org/broken-link-checker/trunk@892958 b8457f37-d9ea-0310-8a92-e5e31aec5664