TODO: API for URL parsing/splitting

docs/TODO

@@ -36,6 +36,7 @@
  1.18 try next proxy if one doesn't work
  1.19 Timeout idle connections from the pool
  1.20 SRV and URI DNS records
+ 1.21 API for URL parsing/splitting
  1.22 Monitor connections in the connection pool
  1.23 Offer API to flush the connection pool
 
@@ -353,6 +354,13 @@
  Offer support for resolving SRV and URI DNS records for libcurl to know which
  server to connect to for various protocols (including HTTP!).
 
+1.21 API for URL parsing/splitting
+
+ libcurl has always parsed URLs internally and never exposed any API or
+ features to allow applications to do it. Still most or many applications
+ using libcurl need that ability. In polls to users, we've learned that many
+ libcurl users would like to see and use such an API.
+
 1.22 Monitor connections in the connection pool
 
  If the server sends HTTP/2 frames (like for example an HTTP/2 PING frame) to