Make all our struct names end with "_t".

This is an automated commit, generated by this command:

./scripts/maint/rename_c_identifier.py \
        address_ttl_s address_ttl_t \
        aes_cnt_cipher aes_cnt_cipher_t \
        authchallenge_data_s authchallenge_data_t \
        authenticate_data_s authenticate_data_t \
        cached_bw_event_s cached_bw_event_t \
        cbuf cbuf_t \
        cell_ewma_s cell_ewma_t \
        certs_data_s certs_data_t \
        channel_idmap_entry_s channel_idmap_entry_t \
        channel_listener_s channel_listener_t \
        channel_s channel_t \
        channel_tls_s channel_tls_t \
        circuit_build_times_s circuit_build_times_t \
        circuit_muxinfo_s circuit_muxinfo_t \
        circuitmux_policy_circ_data_s circuitmux_policy_circ_data_t \
        circuitmux_policy_data_s circuitmux_policy_data_t \
        circuitmux_policy_s circuitmux_policy_t \
        circuitmux_s circuitmux_t \
        coord coord_t \
        cpuworker_job_u cpuworker_job_u_t \
        cv_testinfo_s cv_testinfo_t \
        ddmap_entry_s ddmap_entry_t \
        dircollator_s dircollator_t \
        dist_ops dist_ops_t \
        ecdh_work_s ecdh_work_t \
        ewma_policy_circ_data_s ewma_policy_circ_data_t \
        ewma_policy_data_s ewma_policy_data_t \
        fp_pair_map_entry_s fp_pair_map_entry_t \
        fp_pair_map_s fp_pair_map_t \
        guard_selection_s guard_selection_t \
        mbw_cache_entry_s mbw_cache_entry_t \
        outbuf_table_ent_s outbuf_table_ent_t \
        queued_event_s queued_event_t \
        replyqueue_s replyqueue_t \
        rsa_work_s rsa_work_t \
        sandbox_cfg_elem sandbox_cfg_elem_t \
        scheduler_s scheduler_t \
        smp_param smp_param_t \
        socket_table_ent_s socket_table_ent_t \
        state_s state_t \
        threadpool_s threadpool_t \
        timeout_cb timeout_cb_t \
        tor_libevent_cfg tor_libevent_cfg_t \
        tor_threadlocal_s tor_threadlocal_t \
        url_table_ent_s url_table_ent_t \
        worker_state_s worker_state_t \
        workerthread_s workerthread_t \
        workqueue_entry_s workqueue_entry_t

src/test/test_workqueue.c

@@ -32,7 +32,7 @@ int handled_len;
 bitarray_t *handled;
 #endif
 
-typedef struct state_s {
+typedef struct state_t {
   int magic;
   int n_handled;
   crypto_pk_t *rsa;
@@ -40,13 +40,13 @@ typedef struct state_s {
   int is_shutdown;
 } state_t;
 
-typedef struct rsa_work_s {
+typedef struct rsa_work_t {
   int serial;
   uint8_t msg[128];
   uint8_t msglen;
 } rsa_work_t;
 
-typedef struct ecdh_work_s {
+typedef struct ecdh_work_t {
   int serial;
   union {
     curve25519_public_key_t pk;
@@ -339,7 +339,7 @@ main(int argc, char **argv)
   replyqueue_t *rq;
   threadpool_t *tp;
   int i;
-  tor_libevent_cfg evcfg;
+  tor_libevent_cfg_t evcfg;
   uint32_t as_flags = 0;
 
   for (i = 1; i < argc; ++i) {