Issue #1018324 by Albert Volkman, webbykat, disasm,  jhr, jorap: Add info and examples to docs on how to set up multi-site

    + added support for multi-site configurations.
    + tidied up some old cruft and added code comments.

- On popular demand, patch #10178 by jhriggs: made it possible to expand menu items.

- Patch #7161 by jhriggs: fixed probem with 'last page' link not being correct under certain circumstances.

- Patch #11600 by jhriggs: the module_load_all() function will currently behave unexpectedly if a module cannot be found (has been removed, renamed, etc). Once one module fails to load, all subsequent modules will not be loaded due to a short circuit condition when performing a boolean AND.

- Patch #10920 by jhriggs: fixed bug with comment moderation.

- Small improvement to the filter.module's help text.

- Revert patch that accidentically got committed.  Thanks jhriggs.

- Patch #6682 by jhriggs: added form_checkboxes(), much like form_radios()
  and updated some modules to take advantage of it.

- Patch #7403 by jhriggs: the required-form-items patch that hit HEAD a few days back has an erroneous assignment in form_radios().

- Patch #6498 by jhriggs: <label> requires opening and closing tags.