Fixes #6281

chromeExtensionLinkURL gets crippled in config.xml thus Google Chrome server sharing extension fails to install through crippled link.

Fixed typo

- Fully clean up temporary stream files for all red5 webapps.
- Also clean up temporary stream files for kurento recordings.
- Add a new, separate variable for controlling maximum time to keep
  log files.
- Clean up old (rotated) log files for red5, tomcat, recording which
  were accumulating.