Resolve "acme.sh fails on ISPConfig initial update / install"

Closes #6030

See merge request ispconfig/ispconfig3!1392

unlisted sender improvements

Closes #6018

See merge request ispconfig/ispconfig3!1390

Use password form after resetting password

Closes #6035

See merge request ispconfig/ispconfig3!1395

- fixed wrong certificate path on acme.sh in installer

Resolve "Update README.md"

Closes #6012

See merge request !1388

Resolve "tpl files for dovecot2, mis-spelling SPECIAL-USE > SEPCIAL-USE"

Closes #6001

See merge request ispconfig/ispconfig3!1383

Remove descriptions from forms (#6008)

Closes #6008

See merge request ispconfig/ispconfig3!1384

Resolve "php_fpm_socket_dir label missing"

Closes #6009

See merge request ispconfig/ispconfig3!1385

remote api functions: Roundcube plugins functions

See merge request ispconfig/ispconfig3!1378

Misc small patches

See merge request ispconfig/ispconfig3!1374

Update installer_base.lib.php to overwrite self-signed certificate with LE SSL...

See merge request ispconfig/ispconfig3!1371

Hj Ahmad Rasyid Hj Ismail authored Jan 06, 2021 and Marius Burkard committed Jan 06, 2021

Update installer_base.lib.php to overwrite self-signed certificate with LE SSL certs when possible. A temporary backup is made to be restored if LE SSL certs failed to be issued. It will be made permanent if LE SSL certs are successfully issued. To resolve raised issue ispconfig/ispconfig3#5919

Resolve "Remote user logins not working"

Closes #5989

See merge request !1382

Improve security

Closes #5985 and #5984

See merge request ispconfig/ispconfig3!1380

Resolve "Don't use md5 hashing for remote user passwords"

Closes #5986

See merge request !1381

5970 confidential issue

See merge request ispconfig-confidential/ispconfig3!4