CLEANUP: fix typos in reg-tests

Fix typos in comments and error messages of reg-tests. Note that this
has not been qualified as minor as it is used for testing purposes, not
end-users.
diff --git a/reg-tests/log/b00000.vtc b/reg-tests/log/b00000.vtc
index b28ac94..99a81cd 100644
--- a/reg-tests/log/b00000.vtc
+++ b/reg-tests/log/b00000.vtc
@@ -8,7 +8,7 @@
 # requiring LW_BYTES is set), the log is emitted after the connection is
 # closed, so the address and ports cannot be retrieved anymore.
 #
-# It could be argued that we'd make a special case of these to immediatly
+# It could be argued that we'd make a special case of these to immediately
 # retrieve the source and destination addresses from the connection, but it
 # seems cleaner to simply pin the front connection, marking it "tracked" by
 # adding the LW_XPRT flag to mention that we'll need some of these elements