fix: align POSIX stdio and argument handling, clarify Intel iwlwifi licensing

programs/lib/libc/crt/crt1.c

@@ -91,6 +91,14 @@ void _start(void) {
 
         argbuf[len] = '\0';
 
+        /* Split on spaces, honouring '...' and "..." so an argument can
+           contain them: `git commit -m "two words"` has to reach main()
+           as two arguments, not three. The quotes are removed, and the
+           token is rewritten in place -- the unquoted form is never
+           longer than the quoted one, so it always fits. Quotes are the
+           only metacharacter: there is no escaping and no substitution,
+           which is deliberate. The kernel hands over one flat string
+           (SYS_GETARGS) and this is a tokenizer, not a shell. */
         char* p = argbuf;
         while (*p != '\0' && argc < 255) {
             while (*p == ' ') {
@@ -101,15 +109,27 @@ void _start(void) {
                 break;
             }
 
-            argv[argc++] = p;
+            char* out = p;
+            argv[argc++] = out;
 
-            while (*p != '\0' && *p != ' ') {
+            char quote = 0;
+            while (*p != '\0' && (quote != 0 || *p != ' ')) {
+                if (quote == 0 && (*p == '"' || *p == '\'')) {
+                    quote = *p++;
+                } else if (quote != 0 && *p == quote) {
+                    quote = 0;
+                    p++;
+                } else {
+                    *out++ = *p++;
+                }
+            }
+
+            /* Step over the separator before terminating: the write
+               below lands on the byte p is about to leave behind. */
+            if (*p != '\0') {
                 p++;
             }
-
-            if (*p != '\0') {
-                *p++ = '\0';
-            }
+            *out = '\0';
         }
     }