Don't send to realms with no servers

When we are using c-ares to resolve otherrealm server names asynchronously,
there is a period of time during startup during which a realm may have no
servers whose names we have successfully resolved.  This can also happen
when a realm is added, or when servers for a realm are deleted, and even
without asynchronous resolution, it can happen if we are having trouble
resolving names.

We now avoid trying to send notices to realms for which there are no usable
servers (that is, servers which are not deleted, not marked nosend, and
whose names have been resolved).  Currently, when this happens, the notice
to be sent is just dropped on the floor.  Arguably, we should manage a
queue of packets waiting to be sent to such a realm, and resend them if we
ever discover a usable server.  But that would be complicated.

In addition, since we are basically never ready to send realm wakeups when
processing the realm.list, they are now deferred until the first server's
name has been resolved (and then, until the timer queue is processed).
This has the additional effect of causing wakeups to be sent for realms
which appear during a realm.list reload.

1 files changed, 0 insertions, 2 deletions

diff --git a/server/main.c b/server/main.c
index 8e326d9..0186b17 100644
--- a/server/main.c
+++ b/server/main.c
@@ -258,8 +258,6 @@ main(int argc,
     gettimeofday(&t_local, NULL);
     uptime = NOW;
 
-    realm_wakeup();
-
     for (;;) {
 	if (doreset)
 	    do_reset();