Applied all relevant PCem commits;

Extensively cleaned up and changed the CD-ROM code;
Removed CD-ROM IOCTTL (it was causing performance and stability issues);
Turned a lot of things into device_t's;
Added the PS/1 Model 2011 XTA and standalone XTA hard disk controllers, ported from Varcem;
Numerous FDC fixes for the PS/1 Model 2121;
NVR changes ported from Varcem;
The PCap code no longer requires libpcap to be compiled;
Numerous fixes to various SCSI controllers;
Updated NukedOPL to 1.8;
Fixes to OpenAL initialization and closing, should give less Audio issues now;
Revorked parts of the common (S)VGA code (also based on code from QEMU);
Removed the Removable SCSI hard disks (they were a never finished experiment so there was no need to keep them there);
Cleaned up the SCSI hard disk and Iomega ZIP code (but more cleanups of that are coming in the future);
In some occasions (IDE hard disks in multiple sector mode and SCSI hard disks) the status bar icon is no longer updated, should improve performance a bit;
Redid the way the tertiary and quaternary IDE controllers are configured (and they are now device_t's);
Extensively reworked the IDE code and fixed quite a few bugs;
Fixes to XT MFM, AT MFM, and AT ESDI code;
Some changes to XTIDE and MCA ESDI code;
Some fixes to the CD-ROM image handler.

src/floppy/fdd.h

@@ -8,7 +8,7 @@
  *
  *		Definitions for the floppy drive emulation.
  *
- * Version:	@(#)fdd.h	1.0.3	2018/03/17
+ * Version:	@(#)fdd.h	1.0.4	2018/04/12
  *
  * Authors:	Fred N. van Kempen, <decwiz@yahoo.com>
  *		Miran Grca, <mgrca8@gmail.com>
@@ -135,7 +135,6 @@ extern void	fdd_format(int drive, int side, int density, uint8_t fill);
 extern int	fdd_hole(int drive);
 extern double	fdd_byteperiod(int drive);
 extern void	fdd_stop(int drive);
-extern int	fdd_empty(int drive);
 extern void	fdd_set_rate(int drive, int drvden, int rate);
 
 extern int	motorspin;