GitLab

- Patch #100787 by chx: having a #theme for an element changes the meaning of prefix from 'prefix of this element' to 'prefix of the children elements'.

#100516: CSS preprocessor to cache and compress all .css files. Benchmarks show up to 40% faster page loads.

- Patch #98688 by greggles: string cleanup.  Follow RFC2606 and use example.com for domain name examples.  Core uses that consistently so make sure your contributed modules do too.

#91624 by chx and RobRoy. PHP has an inconsistentcy about magic quoting which we have to work around.

- Patch #88287 by asimmonds, dww et al: installer doesn't support modules outside root/modules directory.  Critical bugfix.

  the most important 404s and 403s.  This makes the watchdog data easier to
  use.  Improved consistency of the 'amdminister > logs' section.