Fix typos in docs
Fix typos in docs

Thanks to Chris Davies for spotting them.

zhoualbeart/Varnish-Cache,franciscovg/Varnish-Cache,mrhmouse/Varnish-Cache,gauthier-delacroix/Varnish-Cache,drwilco/varnish-cache-drwilco,1HLtd/Varnish-Cache,mrhmouse/Varnish-Cache,mrhmouse/Varnish-Cache,ambernetas/varnish-cache,wikimedia/operations-debs-varnish,gquintard/Varnish-Cache,zhoualbeart/Varnish-Cache,franciscovg/Varnish-Cache,ajasty-cavium/Varnish-Cache,ajasty-cavium/Varnish-Cache,gquintard/Varnish-Cache,chrismoulton/Varnish-Cache,varnish/Varnish-Cache,1HLtd/Varnish-Cache,gauthier-delacroix/Varnish-Cache,1HLtd/Varnish-Cache,ambernetas/varnish-cache,varnish/Varnish-Cache,mrhmouse/Varnish-Cache,feld/Varnish-Cache,ssm/pkg-varnish,varnish/Varnish-Cache,chrismoulton/Varnish-Cache,alarky/varnish-cache-doc-ja,chrismoulton/Varnish-Cache,ambernetas/varnish-cache,ajasty-cavium/Varnish-Cache,alarky/varnish-cache-doc-ja,franciscovg/Varnish-Cache,feld/Varnish-Cache,ajasty-cavium/Varnish-Cache,varnish/Varnish-Cache,gauthier-delacroix/Varnish-Cache,gquintard/Varnish-Cache,drwilco/varnish-cache-drwilco,ssm/pkg-varnish,wikimedia/operations-debs-varnish,chrismoulton/Varnish-Cache,alarky/varnish-cache-doc-ja,zhoualbeart/Varnish-Cache,ajasty-cavium/Varnish-Cache,feld/Varnish-Cache,drwilco/varnish-cache-drwilco,chrismoulton/Varnish-Cache,ssm/pkg-varnish,alarky/varnish-cache-doc-ja,wikimedia/operations-debs-varnish,feld/Varnish-Cache,1HLtd/Varnish-Cache,ssm/pkg-varnish,alarky/varnish-cache-doc-ja,wikimedia/operations-debs-varnish,gquintard/Varnish-Cache,gauthier-delacroix/Varnish-Cache,zhoualbeart/Varnish-Cache,gauthier-delacroix/Varnish-Cache,franciscovg/Varnish-Cache,varnish/Varnish-Cache,wikimedia/operations-debs-varnish,mrhmouse/Varnish-Cache,ssm/pkg-varnish,feld/Varnish-Cache,zhoualbeart/Varnish-Cache,franciscovg/Varnish-Cache