#8 Multiline --prologue/--epilogue

[Stephen Clouse]

In our environment, there's an %if/%else/%endif block
that we add to every Perl specfile. We've kept this in
our .cpan2rpm file with something like this:

--epilogue="tag:%if %{foo}\n%define bar\n%else\n%define
baz\n%endif"

but it broke at some point, I'm assuming due to a
change in Getopt::ArgvFile. Rather than worrying about
that, I decided we should just be able to have multiple
--(pro|epi)logue switches, one for each line. This
patch makes that work (previously the code that
processed those was overwriting instead of
concatenating) and adds a little doc note.

[Stephen Clouse]