Also dropped the single-letter identifier for most fields to prevent conflicts with mail user variables; these were undocumented anyway.

Cleanup performed with the following semantic patch:

	@@
	expression E;
	@@

	- if (E != NULL) {
	- 	timeout_remove(&E);
	- }
	+ timeout_remove(&E);

Cleanup performed with the following semantic patch:

	@@
	expression E;
	@@

	- if (E != NULL) {
	- 	io_remove(&E);
	- }
	+ io_remove(&E);

	@@
	expression E;
	@@

	- if (E != NULL) {
	- 	io_remove_closed(&E);
	- }
	+ io_remove_closed(&E);

Mirrors imap fix in Dovecot: 42149f48624b82fdf9631c256497580154c2e412

It's impossible for the command's pointer to be NULL at this point.
Previously, the command_find() would have returned NULL, but this check
presumably short-circuits that search in the trivial case, so has some
real use.

Problem now found by GCC 7.

This used strftime() directly and allocated memory from the heap before i_fatal().
It also used printf() to send the BYE message, which will only work right when the service is running stand-alone.

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

Apparently, this causes GCC warnings.

This avoids accidents with the array numbering being wrong.

This at least partially replaces the "rawlog" post-login binary. For now
the "rawlog" binary supports some parameters, which aren't configurable
for rawlog_dir.

Clang -Wvargargs complained about passing a bool argument to va_start().

Found with clang -Wstrict-bool.

Plain t_malloc was deprecated in dovecot.

This could have happened with Maildir/mbox and autoexpunging.
Mimics Dovecot/IMAP change ddffbb277e212adb9d594b3d7d1e1d39fa78f7c6.

Mimics Dovecot/IMAP change 1001bda65e9f592d852a26ddd6a993f7973050bf.

This allows completely disabling Sieve processing for a particular user.

Changed handling of ENOSPACE to a normal temporary failure and added handling of ENOQUOTA as a user error.
Patch by Timo Sirainen.

Doveadm-sieve plugin may be broken at this point; not tested so far.

Most important change is that mail service_user was not freed.

Parallel to identical Dovecot change for imap and pop3.

This change is bigger than I would have liked, so this needs to be tested more.

Sieve storage now updates sieve attributes in the user's INBOX if used by ManageSieve.

Added flag to prevent warnings about non-link active scripts and disable critical error logging.
A rather fundamental synchronization problem remains to be solved.