PDP10,PDP11,VAX: Addition of inter operable DUP11, DMC11 and KDP11 devices

This is the results of external KDP development activities.  The KDP side done by Timothe Litt and DMC and DUP by Mark Pizzolato

Additionally, other PDP10 updates from Timothe Litt

PDP10/pdp10_sys.c

@@ -56,6 +56,8 @@ extern DEVICE ry_dev;
 extern DEVICE cr_dev;
 extern DEVICE lp20_dev;
 extern DEVICE dup_dev;
+extern DEVICE kmc_dev;
+extern DEVICE dmc_dev;
 extern UNIT cpu_unit;
 extern REG cpu_reg[];
 extern d10 *M;
@@ -92,6 +94,8 @@ DEVICE *sim_devices[] = {
     &tu_dev,
     &dz_dev,
     &dup_dev,
+    &kmc_dev,
+    &dmc_dev,
     NULL
     };
 
@@ -109,6 +113,7 @@ const char *sim_stop_messages[] = {
     "Invalid I/O controller",
     "Address stop",
     "Console FE halt",
+    "Unaligned DMA",
     "Panic stop"
      };