Needed for adding a per-mailbox event in later commit.

Use named initializers and list the items on a separate line each.

lib-sieve: plugins: include: ext-include-binary - Properly check whether binary dependency block load succeeded.

Otherwise, a segfault may occur on a corrupt binary.

The sieve_binary_block_index/get() functions return NULL when the block index is
invalid somehow. This was not handled by the dumper, thereby causing a crash.

Problem reported by scan-build.

lib-sieve: plugins: imap4flags: test-hasflag - Fix segfault occurring for command without arguments.

This commit simplifies the help-string definitions and makes them more
consistent with the upstream configuration of the dovecot/core project.

Drop the inline definition of the TEST_WITH macro in favor of using a
verbatim copy of the file that contains the macro from the dovecot/core
project. This allows easier tracking of changes to the macro that happen
upstream.

Copied verbatim from dovecot/core project.

Copied verbatim from dovecot/core project.

This is a corner case that doesn't happen in practice, but it can be created in
the test suite.