K 10
svn:author
V 2
cy
K 8
svn:date
V 27
2020-04-07T19:57:34.174137Z
K 7
svn:log
V 217
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.

Obtained from:	src r359676 (kevans)
MFH:		2020Q2

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