logger: Console sessions will now respect logger.conf dateformat= option

logger: Console sessions will now respect logger.conf dateformat= option

The 'core' console (ie: asterisk -c) does read logger.conf and does
use the dateformat= option.

Whereas 'remote' consoles (ie: asterisk -r -T) does not read logger.conf
and uses a hard coded dateformat option for printing received verbose messages:
  main/logger.c: static char dateformat[256] = "%b %e %T"

This change will load logger.conf for each remote console session and
use the dateformat= option to set the per-line timestamp for verbose messages

Change-Id: I3ea10990dbd920e9f7ce8ff771bc65aa7f4ea8c1
ASTERISK-25358: #close
Reported-by: Igor Liferenko