Only show banner if not connecting to servers

It's tricky to make the banner show first in all cases and it's unlikely
to be seen if someone is connecting to a server already, so just don't
show it.
Change to printtext for first time message too
Suggest /HELP rather than HELP

At this point cmdchars is definitely / and the user might not know they
need to add / to a command.
Merge pull request #88 from dgl/banner

Only show the banner when not connecting to servers