link: enforce sendq size limits
auth: Initialize class and auth blocks with defaults
conn: Allow sendq reset, e.g. for with full sendq
Print user and server auth/link/class on welcome/burst
auth: Resolve link block classes
Update tethys.conf.example with new class.sendq
Add parse_size
auth: Parse sendq size with parse_size
Update example conf to show parse_size usage
auth: Grammar fix in message.