no need to check for null and fatal() when calling xmemdup
get rid of the infamous fdlimit() call that no one recalls how it
was supposed to work :-)
missing header
remove fdlimit()
Merge pull request #372 from snimmagadda/54-dsn

Resolve master merge conflicts.
added flags broke the dump function in some cases
remove configurable ciphers + curve, we don't want it
Merge branch 'master' into 54-DSN
Merge branch '54-DSN' of https://github.com/poolpOrg/OpenSMTPD into 54-DSN
perform hostname lookup BEFORE starting tls
more steps towards SNI
functional SNI
bzero -> memset
bzero -> memset
bzero -> memset
bzero -> memset
bzero -> memset
bzero -> memset
bzero -> memset
bzero -> memset