Get rid of fs->realpath

src/fs.h

@@ -5,15 +5,16 @@
 enum { MG_FS_READ = 1, MG_FS_WRITE = 2, MG_FS_DIR = 4 };
 
 // Filesystem API functions
+// stat() returns MG_FS_* flags and populates file size and modification time
+// list() calls fn() for every directory entry, allowing to list a directory
 struct mg_fs {
-  char *(*realpath)(const char *path, char *resolved_path);
   int (*stat)(const char *path, size_t *size, time_t *mtime);
   void (*list)(const char *path, void (*fn)(const char *, void *), void *);
-  struct mg_fd *(*open)(const char *path, int flags);
-  void (*close)(struct mg_fd *fd);
-  size_t (*read)(void *fd, void *buf, size_t len);
-  size_t (*write)(void *fd, const void *buf, size_t len);
-  size_t (*seek)(void *fd, size_t offset);
+  struct mg_fd *(*open)(const char *path, int flags);      // Open file
+  void (*close)(struct mg_fd *fd);                         // Close file
+  size_t (*read)(void *fd, void *buf, size_t len);         // Read file
+  size_t (*write)(void *fd, const void *buf, size_t len);  // Write file
+  size_t (*seek)(void *fd, size_t offset);                 // Set file position
 };
 
 // File descriptor