mailbox_get_last_error() should be used only for client-visible errors.
The internal errors should be used for logging.

It indicates that script execution exceeded a resource limit (currently only CPU
time limit).

It is immediately referenced in sieve_interpreter_continue(), called from there.

Applies to Sieve scripts being evaluated before the actual action execution.

Caused by recent event API changes.

This way, it matches the new sieve_logv().

This reduces the number of log functions for the error handler from four to just
one.

Only calls that require space allocation are to be changed.

perl -i -pe 's/unsigned int ([^,:;]+):1;/bool $1:1;/' **/*.[ch]

lib-sieve: Implemented support for writing runtime trace output to a directory if it exists, much like Dovecot rawlog.

lib-sieve: Renamed sieve_runtime_flags to sieve_execute_flags and made these available to result execution.

Included scripts now execute in the context of the inner parent foreverypart loop.

Needed for test suite.

When the program crosses the boundary of the current jump somehow, the program is terminated and a corruption error is returned.