6CYANA: write aco - CYANA command

Parameters: file=<filename>.aco            (required)
            redac
            xplor
            structures=<integer>           (default: 10)
            maxwidth=<real>                (default: 270.0)
            append

Writes an angle restraint file. Optionally, the output may be appended
to an existing file.  Optionally, redundant dihedral angle restraints
for the Redac strategy (Guentert & Wuethrich, 1991) may be derived
from the current angle statistics and included in the output (option
redac; see the commands angstat make and redac). In order to generate
redundant dihedral angle restraints for a given residue, its local
target function value (and that of its immediate neighbors must be
below the cutoff value given by the variable ang_cut in at least N
structures. Redundant dihedral angle restraints with an allowed range
wider than Df degrees are discarded. The parameters structures and
maxwidth can only be in conjunction with the redac option.
