provide protos to the functions to prevent warnings

const char *JAR = "log/jar506";

#define THREADS 2

void lock(CURL *handle, curl_lock_data data, curl_lock_access access,

          void *useptr );

void unlock(CURL *handle, curl_lock_data data, void *useptr );

struct curl_slist *sethost(struct curl_slist *headers);

void *fire(void *ptr);

char *suburl(char *base, int i);

/* struct containing data of a thread */

struct Tdata {