smbstatus: rework connection dialect printing

smbstatus: rework connection dialect printing

In a later change I want to print the signing cipher which depends upon
the connection dialect. So let's store the connection dialect in the
sessionid struct and move the code that maps dialect integers to strings
to smbstatus.

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>