TODO: fixed 'API for URL parsing/splitting'

 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 CURLINFO_PAUSE_STATE

 1.23 Offer API to flush the connection pool

 1.24 TCP Fast Open for windows

 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 CURLINFO_PAUSE_STATE

 Return information about the transfer's current pause state, in both