Fix typos.

Typos found with codespell.

Please keep in mind that this should have impact on actual code
and must be carefully evaluated:

src/core/or/lttng_circuit.inc
-    ctf_enum_value("CONTROLER", CIRCUIT_PURPOSE_CONTROLLER)
+    ctf_enum_value("CONTROLLER", CIRCUIT_PURPOSE_CONTROLLER)

src/core/mainloop/cpuworker.c

@@ -246,7 +246,7 @@ estimated_usec_for_onionskins(uint32_t n_requests, uint16_t onionskin_type)
   if (onionskin_type > MAX_ONION_HANDSHAKE_TYPE) /* should be impossible */
     return 1000 * (uint64_t)n_requests;
   if (PREDICT_UNLIKELY(onionskins_n_processed[onionskin_type] < 100)) {
-    /* Until we have 100 data points, just asssume everything takes 1 msec. */
+    /* Until we have 100 data points, just assume everything takes 1 msec. */
     return 1000 * (uint64_t)n_requests;
   } else {
     /* This can't overflow: we'll never have more than 500000 onionskins

src/core/mainloop/mainloop.c

@@ -1475,7 +1475,7 @@ get_my_roles(const or_options_t *options)
 
   /* We also consider tor to have the role of a client if the ControlPort is
    * set because a lot of things can be done over the control port which
-   * requires tor to have basic functionnalities. */
+   * requires tor to have basic functionalities. */
   int is_client = options_any_client_port_set(options) ||
                   options->ControlPort_set ||
                   options->OwningControllerFD != UINT64_MAX;

src/core/mainloop/netstatus.c

@@ -72,7 +72,7 @@ note_user_activity(time_t now)
 }
 
 /**
- * Change the time at which "user activitiy" was last seen to <b>now</b>.
+ * Change the time at which "user activity" was last seen to <b>now</b>.
  *
  * Unlike note_user_actity, this function sets the time without checking
  * whether it is in the past, and without causing any rescan of periodic events

src/core/mainloop/periodic.c

@@ -90,7 +90,7 @@ periodic_event_dispatch(mainloop_event_t *ev, void *data)
     next_interval = r;
   } else {
     /* no action was taken, it is likely a precondition failed,
-     * we should reschedule for next second incase the precondition
+     * we should reschedule for next second in case the precondition
      * passes then */
     next_interval = 1;
   }