K 10
svn:author
V 6
kevans
K 8
svn:date
V 27
2020-04-06T23:11:43.208896Z
K 7
svn:log
V 186
ntpd: fix build with -fno-common

Only a small nit here: psl should be declared extern and defined exactly
once.

-fno-common will become the default in GCC10/LLVM11.

MFC after:	3 days

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