FreeBSD_stable_9 - Build #1143 - Fixed

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FreeBSD_stable_9 - Build #1143 - Fixed:

Build information: https://jenkins.FreeBSD.org/job/FreeBSD_stable_9/1143/
Full change log: https://jenkins.FreeBSD.org/job/FreeBSD_stable_9/1143/changes
Full build log: https://jenkins.FreeBSD.org/job/FreeBSD_stable_9/1143/console

Change summaries:

301690 by ngie:
MFstable/10 r301655:

MFC r299766:

Fix logically dead code pointed out by clang/Coverity

parse_context, parse_user_security: test for validity of results from
parse_ascii(..) with by casting to int32_t and comparing to -1; comparing
unsigned types to negative values will always be false.

CID: 1011432, 1011433