Fix some typos

Fix typos and common misspellings in code comments and log messages.

Change-Id: Ie66b89065f2100c1d2125ce5a6c9b1d58df7c8ad
diff --git a/include/osmocom/msc/msc_roles.h b/include/osmocom/msc/msc_roles.h
index b22bc7b..4957175 100644
--- a/include/osmocom/msc/msc_roles.h
+++ b/include/osmocom/msc/msc_roles.h
@@ -236,7 +236,7 @@
 	MSC_A_EV_FROM_T_SEND_END_SIGNAL_REQUEST,
 
 	/* gsm_04_08.c has successfully received a valid Complete Layer 3 message, i.e. Location Updating, CM Service
-	 * Request, Paging Reponse or IMSI Detach. */
+	 * Request, Paging Response or IMSI Detach. */
 	MSC_A_EV_COMPLETE_LAYER_3_OK,
 
 	/* Received a Classmark Update -- during GERAN ciphering, msc_a may have to wait for Classmark information to