updated CHANGELOG

Author: Christopher Hojny

CHANGELOG

@@ -242,6 +242,7 @@ Fixed bugs
 - use double double precision for delta in activity updates of cons_linear.c
 - sort constraints in checkSolOrig() to keep the logic of constraint handlers intact
 - fixed make install when SHARED=no and make uninstall
+- enforce and check symmetry-based constraints to take their locks (in dual reductions) into account
 
 Miscellaneous
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