am 36633f88: added possessive quantifier to OFFSITE_URL regex to address issue https://code.google.com/p/owasp-java-html-sanitizer/issues/detail?id=25

* commit '36633f880daebe2d5a3360ebfe57df5bd4a6e53a':
  added possessive quantifier to OFFSITE_URL regex to address issue https://code.google.com/p/owasp-java-html-sanitizer/issues/detail?id=25