Log: fixed typo.

Scripted change:

$ grep -ril recevied src/ | xargs sed -i s/recevied/received/

Reported-by: <https://github.com/jeffdafoe>
Closes: <https://github.com/nginx/unit/issues/920>
Cc: <https://github.com/meezaan>
Cc: Timo Stark <t.stark@nginx.com>
Signed-off-by: Alejandro Colomar <alx@nginx.com>
Reviewed-by: Andrew Clayton <a.clayton@nginx.com>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

src/nxt_conn_write.c

@@ -97,7 +97,7 @@ nxt_conn_io_write(nxt_task_t *task, void *obj, void *data)
         if (sb.limit == 0) {
             /*
              * Postpone writing until next event poll to allow to
-             * process other recevied events and to get new events.
+             * process other received events and to get new events.
              */
             c->write_timer.handler = nxt_conn_write_timer_handler;
             nxt_timer_add(engine, &c->write_timer, 0);