Update softlayer doc (#3111)
Update softlayer doc (#3111)

* update softlayer doc

fixes #3110

* Substitute Softlayer documentation link

bceasydns/twofactorauth,Nitrokey/dongleauth,Jawshy/twofactorauth,Jawshy/twofactorauth,vgarmash/twofactorauth,cez81/twofactorauth,rugk/twofactorauth,Jawshy/twofactorauth,NormandLemay/twofactorauth,rj175/twofactorauth,jdavis/twofactorauth,vgarmash/twofactorauth,cez81/twofactorauth,bceasydns/twofactorauth,rugk/twofactorauth,rj175/twofactorauth,Jawshy/twofactorauth,NormandLemay/twofactorauth,bjorno/twofactorauth,jdavis/twofactorauth,NormandLemay/twofactorauth,Nitrokey/dongleauth,rugk/twofactorauth,bjorno/twofactorauth,jdavis/twofactorauth,vgarmash/twofactorauth,bjorno/twofactorauth,bceasydns/twofactorauth,cez81/twofactorauth,rj175/twofactorauth,Nitrokey/dongleauth