Fix #1126 by properly setting the mask token to the IP number token.
Fix #1126 by properly setting the mask token to the IP number token.

Varnishtest doesn't see the difference between a VCC core dump and
a VCC error, so a test-case is non-trivial.

Fixes	#1126

gquintard/Varnish-Cache,chrismoulton/Varnish-Cache,ajasty-cavium/Varnish-Cache,feld/Varnish-Cache,chrismoulton/Varnish-Cache,mrhmouse/Varnish-Cache,mrhmouse/Varnish-Cache,mrhmouse/Varnish-Cache,franciscovg/Varnish-Cache,franciscovg/Varnish-Cache,gquintard/Varnish-Cache,chrismoulton/Varnish-Cache,alarky/varnish-cache-doc-ja,zhoualbeart/Varnish-Cache,alarky/varnish-cache-doc-ja,1HLtd/Varnish-Cache,zhoualbeart/Varnish-Cache,varnish/Varnish-Cache,zhoualbeart/Varnish-Cache,feld/Varnish-Cache,gauthier-delacroix/Varnish-Cache,gquintard/Varnish-Cache,varnish/Varnish-Cache,feld/Varnish-Cache,gauthier-delacroix/Varnish-Cache,alarky/varnish-cache-doc-ja,ajasty-cavium/Varnish-Cache,feld/Varnish-Cache,gauthier-delacroix/Varnish-Cache,zhoualbeart/Varnish-Cache,franciscovg/Varnish-Cache,feld/Varnish-Cache,ajasty-cavium/Varnish-Cache,varnish/Varnish-Cache,1HLtd/Varnish-Cache,franciscovg/Varnish-Cache,ajasty-cavium/Varnish-Cache,zhoualbeart/Varnish-Cache,mrhmouse/Varnish-Cache,gauthier-delacroix/Varnish-Cache,gquintard/Varnish-Cache,1HLtd/Varnish-Cache,varnish/Varnish-Cache,gauthier-delacroix/Varnish-Cache,alarky/varnish-cache-doc-ja,mrhmouse/Varnish-Cache,chrismoulton/Varnish-Cache,varnish/Varnish-Cache,alarky/varnish-cache-doc-ja,1HLtd/Varnish-Cache,chrismoulton/Varnish-Cache,ajasty-cavium/Varnish-Cache,franciscovg/Varnish-Cache