Return the used version of libcurl.
fun [] S
Return : S a string.
fun main ()= _showconsole; _fooS _networkVersion; // "libcurl/7.21.2 OpenSSL/0.9.8o zlib/1.2.5 libidn/1.18 libssh2/1.2.7 librtmp/2.3" 0;;