Merge branch issue#210 and master

See merge request !128

The ssh user test has been fixed (there was a permission error).

Issue #210

Merge branch Issue#205 with master

See merge request !126

The path to the PasswordHashFactory class has been updated with the new
typo3 version. This commit fixes the hash_password() function.

Issue#205

Update quickstart.html

See merge request !125

Update index.html

See merge request !124

Typo3 v9

See merge request !123

Typo3 v9

See merge request !122

conformity to typo3 V9.5

See merge request !121

#182 adding links to faq

See merge request !119

Merge branch Dev with Master

See merge request !118

# Conflicts:
#   ui/nG6/pi6/class.tx_nG6_pi6.php

A "}" was missing.

Issues #195, #193, #192, #178

The send_purge_demand_mail() is now going to send an alert mail to the
nG6 admins if a purge demand already exists for a given project, instead
of creating a new one.

Issue #192

New function get_multiple_purge_demand_mail() to warn the nG6 admins
that a purge demand already exists for the given project.

Issue #192

New check_demand_insert trigger to prevent the insertion of a second
purge demand for a given project.

Issue #192

The function add_purge_demand() will not update the run and analyzes
tables if a demand already exists for a given project. (See new trigger)

Issue #192

Function "resend_purge_demand" reworked to ignore hidden runs and
analyzes.

Issues #178, #193

The hidden runs and analyzes do not appear in the mail or volume count
anymore.
Next : the resend function.

Issues #178, #193

2 functions have a new parameter 'get_hidden'

Issues #193, #178

'CC' headers have to be reset not to display "esitoul" 10 times.
Issue #195

This reverts merge request !116

This reverts merge request !115