tpl: Add missing functions to init files

[jmooring]

This is just some housekeeping...

For example, in tpl/urls/init.go, add these:

ns.AddMethodMapping(ctx.PathEscape,
	nil,
	[][2]string{},
)
ns.AddMethodMapping(ctx.PathUnescape,
	nil,
	[][2]string{},
)

We're not using the corresponding docs.yaml entries yet, but we may need them later (and I need them now).

[jmooring]

I'm also going to alphabetize the entries, so the change set will be a bit larger.

[jmooring]

I think we can remove this:

ns.AddMethodMapping(ctx.DoDefer,
	[]string{"doDefer"},
	[][2]string{},
)

The function is marked for internal use, and we have not documented it anywhere.

[bep]

The function is marked for internal use, and we have not documented it anywhere.

I assume a test will fail if it cannot be removed, but I do supsect that there is a template AST rewrite that insert this template func name, but I don't remember if we use the fully qualified name or an alias.

[jmooring]

I assume a test will fail

It does. Thanks.