BUG/MINOR: acl: Fix memory leaks when an ACL expression is parsed

This only happens during the configuration parsing. First leak is the string
representing the last converter parsed, if any. The second one is on the error
path, when the allocation of the ACL expression failed. In this case, the sample
was not released.

This patch fixes the issue #256. It must be backported to all stable versions.
1 file changed