add warning on max_db_connections parameter
immediately bailout disconnected clients
fix typo
remove STARTTLS capability if no certificates in config
fix bug #1029 for SSL/TLS as well
fix regression from 0e510c91bc319c568948c182bcfa1815eb591f2e
fix file-handle leakage in non-threaded daemons; #1029
cache content-type and content-disposition headers
improve timeout behavior in pop3
POP3: fix regression
POP3: check return value
minor cleanup
LMTP: always reset timeout
POP3: reset timeout
SIEVE: modify test-script
SIEVE: decode headers #952
bump version to 3.1.8
Revert "SIEVE: decode headers #952"

This reverts commit 1f0a76c50c596aa02ad7053845df893a2e025241.
SIEVE: proper fix for #952
bump to version 3.1.9