Fix some typos

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

Change-Id: Ie66b89065f2100c1d2125ce5a6c9b1d58df7c8ad
diff --git a/src/libmsc/mncc_call.c b/src/libmsc/mncc_call.c
index 34c7299..e5fc820 100644
--- a/src/libmsc/mncc_call.c
+++ b/src/libmsc/mncc_call.c
@@ -192,7 +192,7 @@
 
 /* Disassociate the rtp_stream from this MNCC call instance, and clear the remote RTP IP:port info.
  * When the MNCC FSM ends for any reason, it will release the RTP stream (which usually triggers complete tear down of
- * the call_leg and CC transaction). If the RTP stream should still remain in use, e.g. during Subseqent inter-MSC
+ * the call_leg and CC transaction). If the RTP stream should still remain in use, e.g. during Subsequent inter-MSC
  * Handover where this MNCC was a forwarding to a remote MSC that is no longer needed, this function must be called
  * before the MNCC FSM instance terminates. Call this *before* setting a new remote RTP address on the rtp_stream, since
  * this clears the rtp_stream->remote ip:port information. */