[dovecot2] changing ./configure

[Bjarne D Mathiesen]

At present, dovecot2 fails to compile under (at least) 10.6.8 because of
the dependency on pando -> stack

Noe, the dovecot2 documentation
    https://wiki2.dovecot.org/CompilingSource
states :
    pandoc (not strictly required
    - you can avoid it by using: PANDOC=false ./configure)

How do I implement that : "PANDOC=false ./configure" in a portfile ?!?

-- 
Bjarne D Mathiesen
Korsør ; Danmark ; Europa
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denne besked er skrevet i et (næsten) M$-frit miljø
MacOS X 10.13.6 High Sierra :
   17" 2011 MacBook Pro ; 2.8GHz Intel Core i7 ; 16GB 1067MHz DDR3
   2012 Mac Pro ; 2 x 3.46GHz 6-Core Xeon ; 48GB
MacOS X 10.6.8 Snow Leopard :
   Mac Mini ; 2GHz Core 2 Duo (64 bit) ; 4GB (3GB actual) 667MHz
   Mac Mini ; 1.83GHz Core Duo (32 bit) ; 2GB 667Mhz