* Enable EIP-2384 for ice age hard fork (#11281)
* ethcore/res: activate agharta on classic 9573000 (#11331)
* Istanbul HF in xDai (2019-12-12) (#11299)
* Istanbul HF in POA Core (2019-12-19) (#11298)
* Istanbul HF in POA Sokol (2019-12-05) (#11282)
* Activate ecip-1061 on kotti and mordor (#11338)
* Enable basic verification of local transactions (#11332)
* Disallow EIP-86 style null signatures for transactions outside tests (#11335)
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