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svn:author
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vmaffione
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svn:date
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2018-12-03T17:40:54.740860Z
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svn:log
V 341
MFC r339659

netmap: add man page for the bridge program

Added bridge(8).
Also, minor fixes to the netmap "bridge" application:
 - indentation fixes and code cleanup
 - better usage description
 - better processing of netmap flags

Reviewed by:    0mp
Approved by:    gnn (mentor)
Differential Revision:  https://reviews.freebsd.org/D17664

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