• Add support for newer GnuTLS 2.2.0 session priority functions. When the option is available, the user might specify TLS settings through the "tls-options" configuration entry.

• Workaround a GnuTLS issue where the client wouldn't be able to negotiate a supported compression protocol with the server (#299).

• Implement variable substitution in Prelude configuration files.

• Allow IDMEF criteria with multiples values for a single path, as can be seen in the following example:

alert.classification.text = (A || B)

This will be internally translated to the original criteria language:

alert.classification.text = A || alert.classification.text = B

• Implement negation of idmef-criteria, allowing to write criteria like:

  ! (alert.classification.text = A || alert.classification.text = B)

• Fix an IDMEF-Criteria matching problem, where the match function would not attempt to match a OR after multiple consecutive AND that failed. Thanks Alexander Afonyashin <firm(at)iname.com> for pointing out the problem.

• Never use non-pointer field, always use the "required" keyword. Fix API consistency issue, that could lead to unexpected behavior.

• Fix multiples problem with prelude_read_multiline / prelude_read_multiline2, (fix a problem with prelude-manager idmef-criteria that wouldn't read
  external ruleset).

• Error out if GnuTLS initialization fail.