6CYANA: library mirror - CYANA command

Parameters: residues=<string>              (required)

This command replaces in the residue library the coordinates of the
residue entries for which at least one atom matches the atom selection
<string> with their mirror images. Residues are mirrored by changing
the sign of the z-coordinate.

The command can be used, for instance, to generate D-amino acids from
the normal L-amino acids.
