Fixes for CMD_LINE, and other fixes to set up ga-6bxc.

mtrr.c, remove redundant define
string.h bug with 0 in strlen

src/include/string.h

@@ -4,10 +4,38 @@
 //extern inline void strcpy(char *dst, char *src) {while (*src) *dst++ = *src++;}
 
 //extern inline int strlen(char *src) { int i = 0; while (*src++) i++; return i;}
+
+#if 1
 extern inline int strnlen(const char *src, int max) { 
   int i = 0; 
-  while ((*src++) && (i < max)) 
-    i++; 
- return i;
+  if (max<0) {
+    while (*src++) 
+      i++; 
+    return i;
+  }
+  else {
+    while ((*src++) && (i < max)) 
+      i++; 
+    return i;
+  }
 }
-
+#else
+static inline size_t strnlen(const char * s, size_t count)
+{
+int d0;
+register int __res;
+__asm__ __volatile__(
+        "movl %2,%0\n\t"
+        "jmp 2f\n"
+        "1:\tcmpb $0,(%0)\n\t"
+        "je 3f\n\t"
+        "incl %0\n"
+        "2:\tdecl %1\n\t"
+        "cmpl $-1,%1\n\t"
+        "jne 1b\n"
+        "3:\tsubl %2,%0"
+        :"=a" (__res), "=&d" (d0)
+        :"c" (s),"1" (count));
+return __res;
+}
+#endif