Update to Wine 2.20. This includes the following changes:

• Improved event support in MSHTML.
• Interpolation modes in Direct3D.
• Improved metafile support in GdiPlus.
• Initial version of Kerberos5 Authentication Package.
• OLE clipboard cache improvements.
• Various bug fixes.

Remove files/patch-partial-reservation. This should not be needed any
longer since on FreeBSD the main wine program is now loaded at a lower
address, making more room available between Wine and 0x80000000, so it
may be ok now if the area above 0x80000000 stays reserved like on other
platforms. [1]

Mark the STAGING option (and hence the wine-staging port as well) as
BROKEN; that patchset still is not available yet, and we cannot wait
forever.

Discussed with: tijl [1]