* Parses the scss and fails validation if a parse error is found

* Does not detect the situation when variables are not present - this
  would involve us parsing the entire tree and would be slow. It could
  also change over time, depending on whats defined in the scss
  from themes.

* Introduces a new admin_setting_scsscode to do this

Two new classes in lib/adminlib. One providing validation for a
newline-delimited textarea supporting domain names, domain wildcards,
IPv4/IPv6 addresses and IPv4/IPv6 ranges. The second providing
validation for a newline-delimited textarea of port numbers.

AMOS BEGIN
  MOV [siteyoutube,core_media],[pluginname,media_youtube]
  MOV [siteyoutube_desc,core_media],[pluginname_help,media_youtube]
  MOV [sitevimeo,core_media],[pluginname,media_vimeo]
  MOV [sitevimeo_desc,core_media],[pluginname_help,media_vimeo]
  MOV [html5audio,core_media],[pluginname,media_html5audio]
  MOV [html5audio_desc,core_media],[pluginname_help,media_html5audio]
  MOV [html5video,core_media],[pluginname,media_html5video]
  MOV [html5video_desc,core_media],[pluginname_help,media_html5video]
  MOV [flashanimation,core_media],[pluginname,media_swf]
  MOV [flashanimation_desc,core_media],[pluginname_help,media_swf]
AMOS END

This version:
* should work with the Behat Goutte driver
* should not suffer from password autofill anxiety
* should allow unmasking (and masking) of a password
* should allow editing of passwords in either masked, or unmasked form

AMOS BEGIN
 MOV [revealpassword,core_form],[passwordunmaskrevealhint,core_form]
AMOS END

Also improved performance caching enabled search areas and
all search areas at the same time.

Damyon Wiese authored Sep 22, 2016 and Dan Poltawski committed Sep 23, 2016

Part of MDL-55071

Frederic Massart authored Aug 29, 2016 and Dan Poltawski committed Sep 23, 2016

Part of MDL-55071

Frederic Massart authored Aug 30, 2016 and Dan Poltawski committed Sep 23, 2016

Part of MDL-55071

Frederic Massart authored Aug 30, 2016 and Dan Poltawski committed Sep 23, 2016

Part of MDL-55071

Frederic Massart authored Aug 18, 2016 and Dan Poltawski committed Sep 23, 2016

Part of MDL-55071

Frederic Massart authored Aug 15, 2016 and Dan Poltawski committed Sep 23, 2016

Part of MDL-55071

Correcting engine is not installed lang string as well.

dirname() is a slow function compared with __DIR__ and using
'/../'.  Moodle has a large number of legacy files that are included
each time a page loads and is not able to use an autoloader as it is
functional code.  This allows those required includes to perform as
best as possible in this situation.

Now put 'enable global search' as last step, thanks to David for the
idea.

David Monllaó authored Feb 23, 2016 and Dan Poltawski committed Feb 23, 2016

Also content_to_text moved to weblib.

David Monllaó authored Feb 19, 2016 and Dan Poltawski committed Feb 23, 2016

Introducing both APIs in moodle along with:
- search_box widget to add a tiny search box
- admin settings with setup steps helper
- cache for search results
- template for a search result
- php unit stuff

Many thanks to Tomasz Muras, Prateek Sachan and Daniel Neis for their contributions, for starting this development
and for pushing for it to be completed. Also thanks to other contributors: Jonathan Harker and eugeneventer.

Adding them to warn people calling the php4 constructor.