win32.mak: Add bugstats.php.dd
bugstats.php.dd: Fix link syntax
overview.dd: Fix DDoc syntax

Regression introduced in commit 24e526e966150baf2cf93b53caa2820e121795cd
regular-expression.dd: Fix category
Merge pull request #577 from CyberShadow/chmgen-2014.05.09

CHM and related fixes