Revert changes to use the new libtls signer api
There are bugs in the new libtls signer that can lead to a crash.
OK tb@ jsing@

use new libtls signer api

ok tb@

add required headers for smtpd.h and remove unnecessary ones in other files.

ok jung@

replaces calls to err(3)/errx(3) with fatal()/fatalx() from log.c
for code that runs in the daemon.

ok florian@ millert@

unplug unused certificate verification code, now that this is done by libtls.

ok tb@ millert@

Start porting smtpd to libtls.

Note that it changes the way SNI works: The certificate to use is now
selected by looking at the names found in the certificates themselves,
rather than the names of the pki entries in the configuration file.
The set of certificates for a tls listener must be defined explicitly by
using the pki listener option multiple times.

ok tb@

Rename the pony process to dispatcher and klondike to crypto.

From gilles@
OK millert@ giovanni@

use new libtls signer api

ok tb@

add required headers for smtpd.h and remove unnecessary ones in other files.

ok jung@

replaces calls to err(3)/errx(3) with fatal()/fatalx() from log.c
for code that runs in the daemon.

ok florian@ millert@

unplug unused certificate verification code, now that this is done by libtls.

ok tb@ millert@

Start porting smtpd to libtls.

Note that it changes the way SNI works: The certificate to use is now
selected by looking at the names found in the certificates themselves,
rather than the names of the pki entries in the configuration file.
The set of certificates for a tls listener must be defined explicitly by
using the pki listener option multiple times.

ok tb@

Rename the pony process to dispatcher and klondike to crypto.

From gilles@
OK millert@ giovanni@

add required headers for smtpd.h and remove unnecessary ones in other files.

ok jung@

replaces calls to err(3)/errx(3) with fatal()/fatalx() from log.c
for code that runs in the daemon.

ok florian@ millert@

unplug unused certificate verification code, now that this is done by libtls.

ok tb@ millert@

Start porting smtpd to libtls.

Note that it changes the way SNI works: The certificate to use is now
selected by looking at the names found in the certificates themselves,
rather than the names of the pki entries in the configuration file.
The set of certificates for a tls listener must be defined explicitly by
using the pki listener option multiple times.

ok tb@

Rename the pony process to dispatcher and klondike to crypto.

From gilles@
OK millert@ giovanni@

replaces calls to err(3)/errx(3) with fatal()/fatalx() from log.c
for code that runs in the daemon.

ok florian@ millert@

unplug unused certificate verification code, now that this is done by libtls.

ok tb@ millert@

Start porting smtpd to libtls.

Note that it changes the way SNI works: The certificate to use is now
selected by looking at the names found in the certificates themselves,
rather than the names of the pki entries in the configuration file.
The set of certificates for a tls listener must be defined explicitly by
using the pki listener option multiple times.

ok tb@

Rename the pony process to dispatcher and klondike to crypto.

From gilles@
OK millert@ giovanni@

unplug unused certificate verification code, now that this is done by libtls.

ok tb@ millert@

Start porting smtpd to libtls.

Note that it changes the way SNI works: The certificate to use is now
selected by looking at the names found in the certificates themselves,
rather than the names of the pki entries in the configuration file.
The set of certificates for a tls listener must be defined explicitly by
using the pki listener option multiple times.

ok tb@

Rename the pony process to dispatcher and klondike to crypto.

From gilles@
OK millert@ giovanni@