all: make buildable again for new 'misc.h' header file

With the 4 header files removed in the previous patch,
this commit just changes all those obsolete references
to that new consolidated 'misc.h' header file instead.

Signed-off-by: Jim Warner <james.warner@comcast.net>

ps/sortformat.c

@@ -26,7 +26,7 @@
 
 #include <sys/types.h>
 
-#include "../proc/sysinfo.h"
+#include "../proc/misc.h"
 #include "../include/xalloc.h"
 
 #include "common.h"