Dovecot core doesn't have copyright notices in header files.

Clang static analyzer is happy now.

Imap4flags: added support for obsolete imapflags extension for backwards compatibility with CMUSieve.

Exported variable string argument into the Sieve engine itself as 'catenated string' (for similar use in other extensions like the testsuite).

Enforced limits on string length and handled the finite nature of integers for number parsing and the construction of the AST.

Made error reporting cleaner by avoiding the scriptname of the main script and indicating that the printed numbers are in fact source code lines.

Added the concept of persistent tags and implemented imapflags extension for bare keep and fileinto commands (intermittent commit, not working properly yet).