mail/dovecot2-pigeonhole: 0.4.12 -> 0.4.13

• redirect action: Added the list-id header to the duplicate ID for mail loop prevention. This means that the message sent directly to the user and the message coming through the mailing list itself are treated as different messages by the loop detection of the redirect command, even though their Message-ID may be identical.
• Changed the Sieve number type to uint64_t, which means that Sieve numbers can now technically range up to 2^64. Some other Sieve implementation allowed this, making this change necessary for successful migration.

+ Implemented the sieve_implicit_extensions setting. The extensions

listed in this setting do not need to be enabled explicitly using the
Sieve "require" command. This behavior directkly violates the
standard, but can be necessary for compatibility with some existing
implementations of Sieve. Do not use this setting unless you really
need to!

• redirect action: Made mail loop detection more robust by forcibly adding a Message-ID header if it is missing.
• Prevent logging a useless "script not found" error message for LDAP scripts for which the entry exists but no attribute containing a script. This is not necessarily an error.
• extprograms plugin: Changed the communication channel between parent and child process for a directly forked program from a socketpair to a double pipe. Linux does not support /dev/stdin, /dev/stdout and friends for sockets. For some shell program authors this may be confusing, so that is why it is changed. When using the script service, these device nodes are still not usable though.

PR: 208108
Submitted by: Larry Rosenman <ler@lerctr.org> (maintainer)