+ call readi(controlcard,'CONSTR_DIST',constr_dist,0)
+ write (iout,*) "with_dihed_constr ",with_dihed_constr,
+ & " CONSTR_DIST",constr_dist
+ refstr = index(controlcard,'REFSTR').gt.0
+ pdbref = index(controlcard,'PDBREF').gt.0
+ dyn_ss=(index(controlcard,'DYN_SS').gt.0)
+C /06/28/2013 Adasko: dyn_ss is keyword allowing to break and create bond
+C disulfide bond. Note that in conterary to dynamics this in
+C CONTROLCARD. The bond are read in molread_zs.F
+ call flush(iout)