int libssh2_knownhost_readfile(LIBSSH2_KNOWNHOSTS *hosts,
const char *filename, int type);
DESCRIPTIONReads a collection of known hosts from a specified file and adds them to the collection of known hosts.
filename specifies which file to read
type specifies what file type it is, and LIBSSH2_KNOWNHOST_FILE_OPENSSH is the only currently supported format. This file is normally found named ~/.ssh/known_hosts