Windows installer: Update SBCL.
Add more project licenses to the Windows installer.
Crosscomiled Windows/ECL: Use w64devkit, not winlibs.
Update ECL to 26.5.5.
Windows: Update wxMaxima to 26.05.0.
Windows installer: Update SBCL.
Windows installer: Build ECL with ASDF.
Windows lispselector: Allow ECL as default Lisp (if enabled).
