minimal logtalez client example

miniclient.c

#include <czmq.h>                                                                                         
                                                                                                          
int                                                                                                       
main (void)                                                                                               
{                                                                                                         
    zsock_t *client = zsock_new (ZMQ_SUB);                                                                
    assert (client);                                                                                      
    zsock_set_subscribe (client, "");                                                                     
                                                                                                          
    zcert_t *server_cert = zcert_load ("home/example_user/.curve/example_client__cert");                  
    assert (server_cert);                                                                                 
                                                                                                          
    char *server_key = zcert_public_txt (server_cert);                                                    
    assert (server_key);                                                                                  
                                                                                                          
    zcert_t *client_cert = zcert_load ("home/example_user/.curve/example_client_cert");                   
    assert (client_cert);                                                                                 
                                                                                                          
    zcert_apply (client_cert, client);                                                                    
    zsock_set_curve_serverkey (client, server_key);                                                       
                                                                                                          
    int rc = zsock_connect (client, "tcp://example_server.com:24444");                                    
    assert (rc == 0);                                                                                     
                                                                                                          
    while (1) {                                                                                           
        char *log = zstr_recv (client);                                                                   
        printf ("%s\n", log);                                                                             
    }                                                                                                     
}