Connectivity for CY2

[callumjd]

When loading a PDB and applying CY2 parameters (using CysS-.off, CysS-.frcmod) Amber tleap does not connect the CY2 to neighbouring residues and instead places a "TER" so that CY2 is floating in space, unconnected in the protein chain.

Fixing the connectivity array inside CysS-.off corrects this:

(lines 33,34,35):

!entry.CY2.unit.connect array int
 1
 9

(lines 71,72):

!entry.CY2.unit.residueconnect table  int c1x  int c2x  int c3x  int c4x  int c5x  int c6x
 1 9 0 0 0 0