Apply a patch from Larry Doolittle to add "-all" and "-none" switches

to multibuild.pl.  I did a little formatting adjustments to make it
_very_ obvious when things stop working.  I also removed the USE_PROCFS
config option -- just do the right thing when USE_DEVPS_PATCH is enabled.
 -Erik

ps.c

@@ -52,10 +52,6 @@ static const int TERMINAL_WIDTH = 79;      /* not 80 in case terminal has linefo
  * the one using the /proc virtual filesystem.
  */
 
-#if ! defined BB_FEATURE_USE_PROCFS
-#error Sorry, I depend on the /proc filesystem right now.
-#endif
-
 typedef struct proc_s {
 	char
 	 cmd[16];					/* basename of executable file in call to exec(2) */