To make it possible to support a larger structure.

Fixes a scan-build warning.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=51640

Similar to 35f9091b, IsRectEmpty() is the wrong way to check if padding is empty.

base_url was never freed, and can simply be enlarged instead of copying
it to a new buffer.

Instead of ERROR_SUCCESS.

If fileW is not null, it is freed at the end of the function.

If read_identity returns FALSE, it has already called clear_identity.

Make it more consistent, as well. Currently we alternate between 5 seconds and
60; instead just make it a consistent 60 after the first wait.

When +relay is on, always wait for 300 seconds, instead of alternating between
60 and 300.

This is actually a public debugging facility, but currently applies exclusively
to Wine internal locks. While we could expand this feature to all critical
sections, no application is known to depend on it, and the fact that it is a
debugging feature means it is not very likely we will ever find one.

As far as Wine is concerned, I believe this feature is unused. I have not heard
any mention of it in at least five years.

Moreover, we have a different tool for debugging critical section timeouts,
namely, the ERR messages in the same function. These messages provide just as
much information while being less destructive to the process state.