K 10
svn:author
V 6
kevans
K 8
svn:date
V 27
2018-10-25T02:14:35.306501Z
K 7
svn:log
V 469
lualoader: Improve module loading diagnostics

Some fixes:

- Maintain historical behavior more accurately w.r.t verbose_loading;
  verbose_loading strictly prints "${module_name...}" and later "failed!"
  or "ok" based on load success
- With or without verbose_loading, dump command_errbuf on load failure.
  This usually happens prior to ok/failed if we're verbose_loading

Reviewed by:	imp
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D17694

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