The AHA/BusLogic reset controllers' BIOS commands now return 0x80 (no device present error) for CD-ROM drives if the device is market as not supporting CD-ROM boot, fixes sending of WRITE (10) to CD-ROM drives followed by hang;

The CD-ROM and SCSI disk REQUEST SENSE commands no longer incorrectly set the phase to status;
REQUEST SENSE with non-data direction control byte is now treated as a request to send sense bytes from the command directly to the sense buffer;
SCSI and SLiRP threads now terminate themselves again when out of the while loop;
SCSI and SLiRP mutexes are now closed when the threads terminate themselves;
Fixed a bug causing the "Press F12+F8 or middle mouse button to release" string on the title bar to get corrupt.

src/scsi/scsi_disk.c

@@ -1326,7 +1326,6 @@ void scsi_hd_request_sense(uint8_t id, uint8_t *buffer, uint8_t alloc_length)
 
 	if (shdc[id].unit_attention && (scsi_hd_sense_key == 0))
 	{
-		SCSIPhase = SCSI_PHASE_STATUS;
 		buffer[2]=SENSE_UNIT_ATTENTION;
 		buffer[12]=ASC_MEDIUM_MAY_HAVE_CHANGED;
 		buffer[13]=0x00;