[Sheepdog] [PATCH 0/6] Some trivial tidying-up and wording changes

[Chris Webb]

This is a completely trivial patch series which just addresses things like
variation between capitalized and non-capitalized messages sent to syslog,
standardizing different wordings and styles for the same error message,
clarifying wording, and so on. It should have no functional effects
whatsoever.

The changes apply to lib/* and to sheep/*, but do not affect the collie tool,
for which I'll prepare a follow-up series.