Fixes for some E_NOTICE and type-hints added (#5358)

Fixes for some E_NOTICE and type-hints added (#5358)

* Fixed http://github to https://github

Signed-off-by: Roland Häder <roland@mxchange.org>
* Fixes for #4965:
- updated messages.po file

Signed-off-by: Roland Häder <roland@mxchange.org>
* Fixed E_NOTICE where isset()/empty() was absent.

Signed-off-by: Roland Häder <roland@mxchange.org>
* Fixed missing variable $sql_order causing E_NOTICE.

Signed-off-by: Roland Häder <roland@mxchange.org>
* Continued:
- added array type-hint where known (some)

Signed-off-by: Roland Häder <roland@mxchange.org>
* Fixes:
- in Profile::load() $user is now only one-dimensional
- $a->get_hostname is no property, it is a method

Signed-off-by: Roland Häder <roland@mxchange.org>
* reverted changes that are unintended

Signed-off-by: Roland Häder <roland@mxchange.org>
* Continued:
- removed leading \ (uncommon, okay)
- removed entire if() block (CR by Hypolite)

Signed-off-by: Roland Häder <roland@mxchange.org>
* Removed if() block

Signed-off-by: Roland Häder <roland@mxchange.org>