Fix some typos
Fix typos and common misspellings in code comments and in the manual.
Change-Id: I46fc9d424620c77ae9ccf78b58081bd303386d7c
diff --git a/doc/manuals/mgw/classic-bsc.msc b/doc/manuals/mgw/classic-bsc.msc
index 56d2889..97b6513 100644
--- a/doc/manuals/mgw/classic-bsc.msc
+++ b/doc/manuals/mgw/classic-bsc.msc
@@ -1,5 +1,5 @@
# MO Call on a classic E1 Abis BTS with classic E1 A BSC
-# not actually supported by OsmoBSC (nor planned), for refrence only
+# not actually supported by OsmoBSC (nor planned), for reference only
msc {
hscale=2;
ms [label="MS"], bts [label="E1 BTS"], bsc[label="OsmoBSC"], trau[label="TRAU"], m_sc[label="MSC"];