Fix for issues 877 & 885 related to a bug in PCRE 6.6

more PHPDocs, unused var, small bit code reformatting

Merge remote-tracking branch 'origin/auth_getUserData_improvements'

* origin/auth_getUserData_improvements:
KISS - remove class constants for REQUIRE_GROUPS & IGNORE_GROUPS and replace with boolea

Merge remote-tracking branch 'origin/auth_getUserData_improvements'

* origin/auth_getUserData_improvements:
KISS - remove class constants for REQUIRE_GROUPS & IGNORE_GROUPS and replace with boolean values
use $requireGroups constants in auth classes; comments; code improvements
fix comment errors, sp. & grammar
code styling - add missing braces
Allow user info to be retrieved without groups
Restore correct public interface of getUserData() for authldap plugin

Conflicts:
inc/common.php

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authplain: Escape ':' in any data field as '\:'

':' is the field delimiter in the authplain flat text
conf/users.auth.php file, but it's also used as an internal delimiter
for the 'mediawiki' passwo

authplain: Escape ':' in any data field as '\:'

':' is the field delimiter in the authplain flat text
conf/users.auth.php file, but it's also used as an internal delimiter
for the 'mediawiki' password hash format. Currently using this hash
format corrupts the file

This change escapes ':' as '\:' in any field in the users.auth.php
file, and any '\' as '\\'.

Also adds test cases for escaping modes.

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Allow user info to be retrieved without groups

Some parts of dokuwiki (e.g. recent changes, old revisions) can
requests lots of user info (to provide editor names) without
requiring any group inform

Allow user info to be retrieved without groups

Some parts of dokuwiki (e.g. recent changes, old revisions) can
requests lots of user info (to provide editor names) without
requiring any group information.

This change also implements caching of user info by authmysql &
authpgsql plugins to avoid repeated querying of the DB to retrieve
the same user information.

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correctly count deleted users in plain auth FS#2800

reloading the user list after the delete action will make sure the count
is always correct.

fixed authplain

* code/PHP5 cleanup

make all sub auth classes call the parent constructor

This does nothing currently but allows us adding certain things
to the base class later.

Merge remote-tracking branch 'janschumann/master' into future

This merge fixes all conflicts but is otherwise untested and might break
funktionality in the auth system somewhere. It NEEDS MAJOR TEST

Merge remote-tracking branch 'janschumann/master' into future

This merge fixes all conflicts but is otherwise untested and might break
funktionality in the auth system somewhere. It NEEDS MAJOR TESTING!

Some refactoring of the auth plugins is still needed:

* move to PHP5 style
* fix comments
* add plugin.info.txt

* janschumann/master:
Refactored auth system: All auth methods are now introduced as plugins.
Bugfix: auth types are now correcty added
Setup auth system from plugins
Added Auth-Plugin-Prototype to autoload
Load auth types from plugins in settings_authtype class
Added prototype for Auth-Plugins
added plugin type 'auth'

Conflicts:
inc/auth.php
inc/auth/pgsql.class.php
inc/init.php
inc/load.php
lib/plugins/auth.php
lib/plugins/authad/auth.php
lib/plugins/authldap/auth.php
lib/plugins/authmysql/auth.php
lib/plugins/authplain/auth.php

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Refactored auth system: All auth methods are now introduced as plugins.