Fixed handling of links in comment pages, which are represented by subpages in
Moin and therefore need deeper relative links.
1 A normal [link] and a \[non-link\].
2 3 * A [link] in a list.
4 ** A \[non-link\] in a list.
5 6 || [link] || \[non-link\] ||
7 | [link] | \[non-link\] |