K 10
svn:author
V 3
sjg
K 8
svn:date
V 27
2020-04-14T00:57:50.909985Z
K 7
svn:log
V 342
Improve interaction of vectx and tftp

On slow platforms, it helps to spread the hashing load
over time so that tftp does not timeout.

Also, some .4th files are too big to fit in cache of pkgfs,
so increase cache size and ensure fully populated.

MFC of r359700

Reviewed by:	stevek
Differential Revision: https://reviews.freebsd.org/D24287

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