It doesn't match Dovecot convention.

mail_location setting is removed. Use -o parameters to specify the wanted
settings instead.

Adds status parameter to sieve_result_execute().

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).

Use mail_get_message_id() instead of just mail_get_first_header().

Default is now debug logging, which is used for the IMAP plugins. The LDA Sieve
plugin uses info logging.

sieve-tools: sieve-test - Use the new result message amendment callback rather than the prefix error handler.

sieve-tools: sieve-filter - Use the new result message amendment callback rather than the prefix error handler.

lib-sieve: Added sieve_script_env_init() to initialize struct sieve_script_env from struct mail_user.

Now using struct smtp_address rather than sieve_address.
In some cases, struct message_address may prove to be more suitable, but this is the best fit for now.
Adjusted to the renamed fields in struct mail_deliver_context.

The Dovecot API was changed years ago, but apparently sieve-filter was never updated.

Normally, this would merely be an inconsequential memory leak.
However, when the script comes from an LDAP storage, the storage is not closed before master_service_deinit() -> io_loop_destroy().
The LDAP connection's stale io can cause problems while closing the main ioloop.

This adds a new callback to the Sieve script execution environment.

Used the following script:

C_FILES=`git ls-files *.c`
H_FILES=`git ls-files *.h`
for F in "$C_FILES $H_FILES"; do
        echo "$F"
  perl -p -i -e 's/safe_memset\(&\(?([^,]*)\)?,\s*0,\s*sizeof\(\g1\)\)/i_zero_safe(&$1)/g' $F
  perl -p -i -e 's/safe_memset\(([^,]*),\s*0,\s*sizeof\(\*\g1\)\)/i_zero_safe($1)/g' $F
  perl -p -i -e 's/memset\(&\(?([^,]*)\)?,\s*0,\s*sizeof\(\g1\)\)/i_zero(&$1)/g' $F
  perl -p -i -e 's/memset\(([^,]*),\s*0,\s*sizeof\(\*\g1\)\)/i_zero($1)/g' $F
done

Found with clang -Wstrict-bool.

Found with clang -Wstrict-bool.

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

In effect, this adds PIE and RELRO to binaries.