Update tor.1.txt with the currently available log domains.

See: https://bugs.torproject.org/25378

doc/tor.1.txt

@@ -650,7 +650,8 @@ GENERAL OPTIONS
  +
     The currently recognized domains are: general, crypto, net, config, fs,
     protocol, mm, http, app, control, circ, rend, bug, dir, dirserv, or, edge,
-    acct, hist, and handshake.  Domain names are case-insensitive. +
+    acct, hist, handshake, heartbeat, channel, sched, guard, consdiff, and dos.
+    Domain names are case-insensitive. +
  +
     For example, "`Log [handshake]debug [~net,~mm]info notice stdout`" sends
     to stdout: all handshake messages of any severity, all info-and-higher

src/common/log.c

@@ -1258,7 +1258,10 @@ log_level_to_string(int level)
 }
 
 /** NULL-terminated array of names for log domains such that domain_list[dom]
- * is a description of <b>dom</b>. */
+ * is a description of <b>dom</b>.
+ *
+ * Remember to update doc/tor.1.txt if you modify this list.
+ * */
 static const char *domain_list[] = {
   "GENERAL", "CRYPTO", "NET", "CONFIG", "FS", "PROTOCOL", "MM",
   "HTTP", "APP", "CONTROL", "CIRC", "REND", "BUG", "DIR", "DIRSERV",