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svn:author
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pi
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svn:date
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2018-02-17T08:58:54.331118Z
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svn:log
V 231
MFH: r462055

net/quagga: fix build if SNMP is not selected

- configure script tries to detect net-snmp even if not requested,
  but fails, if net-snmp is not installed.

Reported by:	antoine, garga
Approved by:	portmgr (antoine)

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