[ic] Getting a catalog variable with perl

[Kevin Walsh]

> 
> I have an entry in my catalog.cfg file:
> 
> Variable  RSOCKET 192.168.3.4:12000
> 
> I know I can reference this on a page as __RSOCKET__.
> 
> Can I get at it in Perl code?
> 
Two ways, for use in [perl], [calc], [mvasp] etc.:

    my $var1 = q{__RSOCKET__};

    my $var2 = $Variable->{RSOCKET};

A third way, for use in UserTags:

    my $var3 = $::Variable->{RSOCKET};

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