relax SVN archive

task #7793: (https://gna.org/task/?7793) Speed-up of dispersion models.

This is after commit 23216:
The systemtest uses: GRID_INC = None, which have found to be catastrophic: https://gna.org/bugs/?22032.
Commit 23216 fixed this, and now the found minimization point is much much better.

Start:
0.8 3.92 0.39964
End:
0.76982 3.9169 0.41353