router: Only call CloseWrite if it is implemented
router: Only call CloseWrite if it is implemented

Signed-off-by: Jonathan Rudenberg <3692bfa45759a67d83aedf0045f6cb635a966abf@titanous.com>

Brandywine2161/flynn,felixrieseberg/flynn,rikur/flynn,josephglanville/flynn,lmars/flynn,lmars/flynn,justintung/flynn,pkdevbox/flynn,GrimDerp/flynn,felixrieseberg/flynn,supermario/flynn,shads196770/flynn,arekkas/flynn,clifff/flynn,josephglanville/flynn,schatt/flynn,TribeMedia/flynn,whouses/flynn,mubassirhayat/flynn,arekkas/flynn,justintung/flynn,TribeMedia/flynn,GrimDerp/flynn,mubassirhayat/flynn,jzila/flynn,rikur/flynn,arekkas/flynn,technosophos/flynn,whouses/flynn,TribeMedia/flynn,kgrz/flynn,pkdevbox/flynn,jzila/flynn,benbjohnson/flynn,philiplb/flynn,shads196770/flynn,supermario/flynn,pkdevbox/flynn,Brandywine2161/flynn,ozum/flynn,lmars/flynn,flynn/flynn,ozum/flynn,kgrz/flynn,schatt/flynn,ozum/flynn,technosophos/flynn,benbjohnson/flynn,supermario/flynn,jzila/flynn,clifff/flynn,felixrieseberg/flynn,flynn/flynn,tonicbupt/flynn,Brandywine2161/flynn,benbjohnson/flynn,arekkas/flynn,supermario/flynn,flynn/flynn,GrimDerp/flynn,philiplb/flynn,shutej/flynn,clifff/flynn,josephglanville/flynn,TribeMedia/flynn,rikur/flynn,justintung/flynn,supermario/flynn,arekkas/flynn,clifff/flynn,benbjohnson/flynn,technosophos/flynn,GrimDerp/flynn,technosophos/flynn,josephglanville/flynn,pkdevbox/flynn,philiplb/flynn,Brandywine2161/flynn,flynn/flynn,ozum/flynn,whouses/flynn,mubassirhayat/flynn,benbjohnson/flynn,lmars/flynn,TribeMedia/flynn,jzila/flynn,schatt/flynn,lmars/flynn,philiplb/flynn,justintung/flynn,tonicbupt/flynn,clifff/flynn,josephglanville/flynn,shads196770/flynn,kgrz/flynn,justintung/flynn,Brandywine2161/flynn,kgrz/flynn,ozum/flynn,pkdevbox/flynn,flynn/flynn,shads196770/flynn,tonicbupt/flynn,rikur/flynn,tonicbupt/flynn,rikur/flynn,felixrieseberg/flynn,pkdevbox/flynn,felixrieseberg/flynn,ozum/flynn,josephglanville/flynn,whouses/flynn,whouses/flynn,kgrz/flynn,schatt/flynn,justintung/flynn,tonicbupt/flynn,supermario/flynn,philiplb/flynn,Brandywine2161/flynn,rikur/flynn,jzila/flynn,schatt/flynn,benbjohnson/flynn,GrimDerp/flynn,whouses/flynn,mubassirhayat/flynn,kgrz/flynn,shads196770/flynn,technosophos/flynn,clifff/flynn,TribeMedia/flynn,jzila/flynn,schatt/flynn,shads196770/flynn,GrimDerp/flynn