Fix some typos

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

Change-Id: Ie66b89065f2100c1d2125ce5a6c9b1d58df7c8ad
diff --git a/include/osmocom/msc/sgs_server.h b/include/osmocom/msc/sgs_server.h
index a89022d..400bd9e 100644
--- a/include/osmocom/msc/sgs_server.h
+++ b/include/osmocom/msc/sgs_server.h
@@ -44,7 +44,7 @@
 		char vlr_name[SGS_VLR_NAME_MAXLEN];
 		/* timers on VLR side */
 		unsigned int timer[_NUM_SGS_STATE_TIMERS];
-		/* countrs on VLR side */
+		/* counters on VLR side */
 		unsigned int counter[_NUM_SGS_STATE_COUNTERS];
 	} cfg;
 };