logging: Provide lg_perror and lg_vperror
authorIan Jackson <ijackson@chiark.greenend.org.uk>
Mon, 22 Sep 2014 01:00:50 +0000 (02:00 +0100)
committerIan Jackson <ijackson@chiark.greenend.org.uk>
Mon, 6 Oct 2014 22:29:37 +0000 (23:29 +0100)
These are convenience functions for logging module, config location,
errno value, etc., along with a full formatted message.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

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