General cleanup:

- clean up kernel section of minix/com.h somewhat
- remove ALLOCMEM and VM_ALLOCMEM calls
- remove non-safecopy and minix-vmd support from Inet
- remove SYS_VIRVCOPY and SYS_PHYSVCOPY calls
- remove obsolete segment encoding in SYS_SAFECOPY*
- remove DEVCTL call, svrctl(FSDEVUNMAP), map_driverX
- remove declarations of unimplemented svrctl requests
- remove everything related to swapping to disk
- remove floppysetup.sh
- remove traces of rescue device
- update DESCRIBE.sh with new devices
- some other small changes

drivers/readclock/readclock.c

@@ -151,21 +151,6 @@ int main(int argc, char **argv)
   }
   if (Wflag) wflag = 1;		/* -W implies -w */
 
-#if 0
-  /* The hardware clock may run in a different time zone, likely GMT or
-   * winter time.  Select that time zone.
-   */
-  strcpy(clocktz, "TZ=");
-  sysgetenv.key = "TZ";
-  sysgetenv.keylen = 2+1;
-  sysgetenv.val = clocktz+3;
-  sysgetenv.vallen = sizeof(clocktz)-3;
-  if (svrctl(SYSGETENV, &sysgetenv) == 0) {
-	putenv(clocktz);
-	tzset();
-  }
-#endif
-
   /* Read the CMOS real time clock. */
   for (i = 0; i < 10; i++) {
 	get_time(&time1);