Avoid escaping inside here documents

The delimiter can be quoted (single or double) to disable parameter, command
and arithmetic expansion inside the here document:

	$ cat <<__EOT
	echo $(echo foo)
	__EOT
	echo foo

	$ cat <<'__EOT'
	echo $(echo foo)
	__EOT
	echo $(echo foo)

Do the latter to be able to write the here document/file content exactly as
it would end up in output/rc.firsttime, making it easier to read.

To be more consistent and explicit, switch the remaining here documents with
pure plain text (no shell expansion, etc.) to quoted delimiters.

OK millert

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