* Update helpcontent2 from branch 'master'
  - Help files: http -> https
    
    + some more conservative changes
    
    Change-Id: I34de2e567574679ac724655ec0840cce6ed96edb
    Reviewed-on: https://gerrit.libreoffice.org/63212
    Tested-by: Jenkins
Reviewed-by: Sophie Gautier <gautier.sophie@gmail.com>
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>