PR #9856 works around a buggy markdown processor that cleverly
converts double dashes to em-dash. The unfortunate result is
that the man page source files are unmaintainable, because
every '--foo' has to be specified as '\-\-foo'. This is
impossible for humans to remember, so let's add a helpful
diagnostic message when we detect new options added without
the escapes.
Signed-off-by: Ed Santiago <santiago@redhat.com>