[rh:curlcffi] Add support for curl_cffi

Authored by: coletdjnz, Grub4K, pukkandan, bashonly

Co-authored-by: Simon Sawicki <contact@grub4k.xyz>
Co-authored-by: pukkandan <pukkandan.ytdlp@gmail.com>
Co-authored-by: bashonly <bashonly@protonmail.com>

yt_dlp/dependencies/__init__.py

@@ -74,6 +74,10 @@ else:
     if hasattr(xattr, 'set'):  # pyxattr
         xattr._yt_dlp__identifier = 'pyxattr'
 
+try:
+    import curl_cffi
+except ImportError:
+    curl_cffi = None
 
 from . import Cryptodome