Implement ADMIN, STATS, LINKS, TRACE, USERS, REHASH, CONNECT

Previously these commands fell through to the catch-all 421
'Unknown command' branch.  All of them are RFC1459 commands a
modern client may probe; we now respond with the RFC numerics:

  - ADMIN: 256 + 257 + 258 + 259 administrative info burst.
  - STATS: 219 terminator always; the 'u' query returns 242
    with a parsed uptime, the default returns a single 250
    summary line.  Other queries (m, l, o) are accepted with
    only the terminator (no records to report).
  - LINKS: 364 line for ourselves + 365 terminator (we don't
    link to other servers).
  - TRACE: 206 server entry + 262 terminator.
  - USERS: 392 header + 393 entries + 394 terminator, or 395
    when nobody is logged in.
  - REHASH: 382 for opers, 481 otherwise.  No actual config
    reload (papod reads only env vars at startup).
  - CONNECT: 481 for non-opers, 402 'no such server' otherwise
    (we do not link).

Also added :started-at to the components map so STATS u can
report uptime.

0 files changed, 0 insertions, 0 deletions