Improvements TLC_2021

[markVnl]

The objective are:

• Improve stability on updates in non interactive shells.
• If the NS instance you install nethserver-collabora on has nethserver-nextcloud installed and is the DNS-server: it should work out-off the box on virtual/wopi host collabora.server-domain except for the certificate issue
• If a loolwsd VirtualHost prop is set it respects this.
• Redirect http > https on virtualhost except for acme http-01 challenge
• If the virtual/wopi host does not have a valid cert and nethserver-nextcloud is installed on the same instance try to Disable certificate verification
• Enable certificate verification on certifate-save event if the cert is valid.
• Update documentation in README/documentation/wiki :
  • Reflect the changes made about what the package does.
  • Provide documentation to include exception in web-browser if cert is invalid.
  • Provide documentation to set AllowWopiHost if Nextcloud runs on an other instance.
• Update CODE-brand, loolwsd, collaboraoffice6.x

[markVnl]

Update of documentation:

https://github.com/markVnl/docs/commit/1f69c9300f15b61be858e8ab70db918498fd81bc