tigefa4u projects Trac

Move some parser related aspects of the !WikiSystem and the Formatter into a new !WikiParser component.

r4745 removed my fix of r4733, here's another attempt... Please note that this fix is ''required'' on Windows, as there the parser has no pidfile option.

Decouple the `wiki_to_*` methods from the WikiContext class, and prepare for the parser/formatter split in the Wiki engine.

Ported r4745 to 0.10-stable

fix for relative path check in tracd

PermissionPolicy: merge log:trunk@...:4743 (no net change)

Port non-strictly permission related changes from the security branch, in the Ticket module.

Port non-strictly permission related changes from the security branch, in the Wiki module.

PermissionPolicy: merge log:trunk:4735:4740 (no net change)

Introduce an !AttachmentContext (partial port of r4595 from the security branch)