libcurl-multi.3: "SOCKS proxy handshakes" are not blocking

Since 4a4b63daaa

docs/libcurl/libcurl-multi.3

@@ -172,7 +172,6 @@ the future, you should be aware of the following current restrictions:
 
 .nf
  - Name resolves unless the c-ares or threaded-resolver backends are used
- - SOCKS proxy handshakes
  - file:// transfers
  - TELNET transfers
 .fi