Performance improvement hackathon: improve process comparison routines,

disable useless code in release builds such as runtime type-checking on
dynamic data structures and process fields that are not being computed,
faster(?) method for verifying the process owner (still need to ensure
correctness), don't destroy and create process objects for hidden kernel
threads over and over. Phew. I shouldn't be doing all this today, but I
could not resist.

ProcessList.h

@@ -18,6 +18,7 @@ in the source distribution for its full text.
 #include "Vector.h"
 #include "UsersTable.h"
 #include "Hashtable.h"
+#include "String.h"
 
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -50,11 +51,15 @@ in the source distribution for its full text.
 #endif
 
 #ifndef MAX_READ
-#define MAX_READ 8192
+#define MAX_READ 2048
 #endif
 
 
 
+#ifdef DEBUG
+typedef int(*vxscanf)(void*, const char*, va_list);
+#endif
+
 typedef struct ProcessList_ {
    Vector* processes;
    Vector* processes2;