K 10
svn:author
V 2
cy
K 8
svn:date
V 27
2017-11-01T01:03:44.464294Z
K 7
svn:log
V 375
MFC r324681, r324738

Anticongestion refinements for ntpd rc script. This checks if ntp
leapfile needs fetching before entering into the anticongestion sleep.

Unfortunately some ports still use their own sleeps so, this commit
doesn't address the complete problem which is compounded by every
port that uses its own anticongestion mechanism.

Discussed with:		asomers, feld

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