Do not unmap a driver when the driver dies (it interferes with restarting

disk drivers). Fixed accounting for REVIVING/reviving.

servers/fs/misc.c

@@ -398,7 +398,6 @@ PRIVATE void free_proc(struct fproc *exiter, int flags)
   if(!(flags & FP_EXITING))
 	return;
 
-  dmap_unmap_by_endpt(fp->fp_endpoint);
   /* Invalidate endpoint number for error and sanity checks. */
   fp->fp_endpoint = NONE;
 

servers/fs/pipe.c

@@ -359,6 +359,9 @@ int proc_nr_e;
   if (rfp->fp_suspended == NOT_SUSPENDED) return(OK);
   task = -rfp->fp_task;
 
+  if (rfp->fp_revived == REVIVING)
+	reviving--;
+
   switch (task) {
 	case XPIPE:		/* process trying to read or write a pipe */
 		break;