Also cleaned up "header" handling.
Removed print_header function which was doing two different things and
 misused in some places.

issue #6038

There is a check at login but we want to be able to lock config object
 from setup, before any login attempt.

issue #2895

issue #6024

And convert global_get calls to get

issue #6024

Also global_is_set to is_set.

issue #6024

This allows to avoid ldap reads from pluglist::load, and should fix a
 crash happenning in index.php when using encrypted password in config
 file.

issue #6015

Bumped minimum PHP version to 7.0.0 because we use strict typing.
Removed fallback for random_int.

issue #6002

Moved userinfo related functions as methods in userinfo
Moved ppolicy account expiration check to expired_status method
Split ppolicy fetch in a method so that it can be used by expiration
 warning detection later.

issue #6001

Also moving code to samba and ssh plugins

issue #5970

issue #5955

Fixes of spaces by php-cs-fixer

issue #5955

Basic fixes like identation

issue #5955

issue #5956

issue #5942

Previously it always had the same value as the From header.

issue #5926

The code tries to support generators from modifiers so that random
 string and future number modifiers can return a generator and not store
 large arrays in memory.

issue #5882

Made sure to empty alt attribute when an img is decoration and does not
 provide information.
In some files also fixed some alt content when it made sense

issue #5917

Removed unused session entry, made sure all error reset goes through the
 appropriate function.

issue #5854

issue #5854

issue #5854

issue #5135

Resolve "Security: Insecure Generation of Random Tokens"

See merge request fusiondirectory/fd!325

(cherry picked from commit 2faf258b)

9af5ac62  fix(core) Give using unpack for bytes conversion

Resolve "Security: Insecure Generation of Random Tokens"

See merge request fusiondirectory/fd!322

(cherry picked from commit 697eff83)

4abf4588  fix(core) Avoid crash on 32-bits systems for random_int fallback

Resolve "Security: Insecure Generation of Random Tokens"

See merge request fusiondirectory/fd!319

(cherry picked from commit 6d0aba68)

a8f4d2eb  fix(core) Fix 2 problems in random_int fallback

For PHP<7.0, we fall back on openssl_random_pseudo_bytes from openssl module.

issue #5843

Moved it to a class which get instanciated in userinfo and keeps the
 size limit status for the current session.

issue #5135

issue #5831

issue #5831

issue #5831

issue #5827

ldap_escape was added in 5.6 so no fallback is needed no that we require
 PHP>=5.6.

issue #5827

PHP now has an exponentiation operator ** that can be used instead of
 the pow function.

issue #5827

Instead of less readable func_get_args and call_user_func_array

issue #5827

This also fix the workflow to make sure the language in the header is
 correct in all cases.
A PHP error is triggered if setlocale fails or if the wrong language
 header was sent.

issue #5820

issue #5790

issue #5775

Also fixed local name for both portuguese languages.

issue #5762

issue #5761

There are some left in datepicker.js because of a bug in the sniffer,
 I did not find a way to fix that yet.

issue #5690