html-tidy: align attrname with pkgname

htmlTidy => html-tidy. Keep copy of old attribute for backward
compatibility.
sqlite-interactive: align attrname with pkgname

sqliteInteractive => sqlite-interactive. Keep copy of old attribute for
backward compatibility.
nfs-utils: align attrname with pkgname

nfsUtils => nfs-utils. Keep copy of old attribute for backward
compatibility.