Store certs in certs/. Add mg_unpacked()

src/fs.h

@@ -40,3 +40,8 @@ void mg_fs_close(struct mg_fd *fd);
 char *mg_file_read(struct mg_fs *fs, const char *path, size_t *size);
 bool mg_file_write(struct mg_fs *fs, const char *path, const void *, size_t);
 bool mg_file_printf(struct mg_fs *fs, const char *path, const char *fmt, ...);
+
+// Packed API
+const char *mg_unpack(const char *path, size_t *size, time_t *mtime);
+const char *mg_unlist(size_t no);             // Get no'th packed filename
+struct mg_str mg_unpacked(const char *path);  // Packed file as mg_str

src/fs_packed.c

@@ -8,13 +8,11 @@ struct packed_file {
   size_t pos;
 };
 
-const char *mg_unpack(const char *path, size_t *size, time_t *mtime);
-const char *mg_unlist(size_t no);
-
 #if MG_ENABLE_PACKED_FS
 #else
 const char *mg_unpack(const char *path, size_t *size, time_t *mtime) {
-  (void) path, (void) size, (void) mtime;
+  *size = 0, *mtime = 0;
+  (void) path;
   return NULL;
 }
 const char *mg_unlist(size_t no) {
@@ -23,6 +21,12 @@ const char *mg_unlist(size_t no) {
 }
 #endif
 
+struct mg_str mg_unpacked(const char *path) {
+  size_t len = 0;
+  const char *buf = mg_unpack(path, &len, NULL);
+  return mg_str_n(buf, len);
+}
+
 static int is_dir_prefix(const char *prefix, size_t n, const char *path) {
   // MG_INFO(("[%.*s] [%s] %c", (int) n, prefix, path, path[n]));
   return n < strlen(path) && strncmp(prefix, path, n) == 0 &&