K 10
svn:author
V 3
smh
K 8
svn:date
V 27
2015-11-17T20:55:50.030268Z
K 7
svn:log
V 371
Fix early kernel dump via dumpdev env

Setting the dumpdev via env e.g. loader.conf provides the ability to
configure the kernel dump device during early boot. When using this
g_io_getattr was returning EPERM due to cp->acr == 0.

Fix this by calling g_access to ensure we're a read consumer prior
to calling g_dev_setdumpdev.

MFC after:	2 weeks
Sponsored by:	Multiplay

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