I'm manually adding IMC2 support, and while I'm at it, I'm comparing my changes to SWFoTEFUSS to make sure I've got it right.

The instructions in the snippet say:

This next part is somewhat tricky. If copyover_recover is called in db.c as is the usual case in
most default installs, you need to place the following BEFORE the boot_db call. If it is listed
somewhere here in comm.c, the following needs to be placed ABOVE it. Either way, imc_startup needs
to be called BEFORE copyover_recover or your mud WILL crash every time you do a copyover.

Yet, in comm.c, you have the addition below, not above the boot_db call.

   boot_db( fCopyOver );
   log_string( "Initializing socket" );

   if( !fCopyOver )  /* We have already the port if copyover'ed */
   {
      control = init_socket( port );
   }

#ifdef IMC
   /*
    * Initialize and connect to IMC2 
    */
   imc_startup( FALSE, imcsocket, fCopyOver );
#endif

Take a look again.

   /*
    * Run the game.
    */
   log_string( "Booting Database" );
   boot_db( fCopyOver );
   log_string( "Initializing socket" );

   if( !fCopyOver )  /* We have already the port if copyover'ed */
   {
      control = init_socket( port );
   }

#ifdef IMC
   /*
    * Initialize and connect to IMC2 
    */
   imc_startup( FALSE, imcsocket, fCopyOver );
#endif

   if( fCopyOver )
   {
      log_string( "Initiating hotboot recovery." );
      hotboot_recover(  );
   }

Either way, imc_startup needs
to be called BEFORE copyover_recover or your mud WILL crash every time you do a copyover.

The call to imc_startup is in the proper place.

It says in one sentence it needs to be before boot_db, and in the next sentence it says it needs to be before the copyover/hotboot_recover.

You have it before the recover call, but not before the boot_db call.

No.

It says if copyover_recover is called from db.c that you need to put it above the call to boot_db.
If copyover_recover is called from comm.c, as it is with FUSS, you need to put the call above that.

So there is no bug.