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lwhsu
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svn:date
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2020-08-19T11:20:02.714192Z
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V 385
MFH: r545313

math/units: Add a default option READLINE to tuggle readline support

This makes sure the readline support is tuggled in the build time and not
affected by the libreadline installed or not during build/run time.

PR:		248631
Submitted by:	ports-units@shalott.net
Approved by:	jharris@widomaker.com (maintainer)

Approved by:	portmgr (blanket: build, run, dependency fix)

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