查看版本：
curl 7.77.0 (i386-pc-win32) libcurl/7.77.0 Schannel
Release-Date: 2021-05-26
Protocols: dict file ftp ftps gopher gophers http https imap imaps ldap ldaps mqtt pop3 pop3s rtsp smb smbs smtp smtps telnet tftp
Features: AsynchDNS HSTS IPv6 Kerberos Largefile NTLM SPNEGO SSL SSPI Unicode UnixSockets alt-svc
