kernel: implement initcalls and a testing system

libc/string/strlen.c

@@ -1,14 +1,10 @@
 #include <socks/libc/string.h>
 
 size_t strlen(const char *str) {
-    if (!str) {
-        return 0;
-    }
-
-    size_t res = 0;
-    while (str[res]) {
-        res++;
-    }
-
-    return res;
+	size_t res = 0;
+	while (str[res]) {
+		res++;
+	}
+	
+	return res;
 }