YADE should validate certificates for HTTPS and WebDAV

Current Situation

• YADE does not validate any certificates.

Desired Behavior

• YADE should validate certificates:
  • Expired certificates represent typical errors that prevent validation and should be handled as such.
• YADE can be configured to accept self-signed certificats:
  • An option accept_untrusted_certificate=true would accept a valid certificate that could not be verified to be trusted.
  • The default value for this option is false,
  • This behaviour applies to connections with HTTPS and WebDAV.

Hints

• Users who connect to WebDAV sources or targets should check that valid certificates are in use.
• As previous releases of YADE did not check the validity of certificates therefore starting with release 1.9 invalid certificates might be detected.