curl and libcurl is a tool for transferring files using URL syntax. It supports HTTP, HTTPS, FTP, FTPS, SCP, SFTP, TFTP, DICT, TELNET, LDAP, POP3, IMAP, SMTP, RTSP, RTMP, and FILE, as well as HTTP-post, HTTP-put, cookies, FTP upload, resumed transfers, passwords, port numbers, SSL certificates, Kerberos, and proxies. It is powered by libcurl, the client-side URL transfer library. There are bindings to libcurl for about 40 languages and environments.
major feature: http_digest: Added support for Windows SSPI based authentication. version info: Added Kerberos V5 to the supported features. Makefile: Added VC targets for WinIDN. config-win32: Introduce build targets for VS2012+. SSL: Add PEM format support for public key pinning. smtp: Added support for the conversion of Unix newlines during mail send. smb: Added initial support for the SMB/CIFS protocol. Added support for HTTP over unix domain sockets, via CURLOPT_UNIX_SOCKET_PATH and --unix-socket. SASL: Added support for GSS-API based Kerberos V5 authentication .