git: route: Add rtfree_async.

[Sepherosa Ziehau]

commit db6cc9b077d57f5881281d6c015acb6acd9652ca
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Fri Aug 4 19:03:19 2017 +0800

    route: Add rtfree_async.
    
    This prepares to run rtalloc/lookup/free in the first netisr_ncpus
    netisrs.  This function is only intended to be used on slow path;
    e.g. detach.

Summary of changes:
 sys/net/route.c | 37 ++++++++++++++++++++++++-------------
 sys/net/route.h |  1 +
 2 files changed, 25 insertions(+), 13 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/db6cc9b077d57f5881281d6c015acb6acd9652ca


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