Typo in vanity constants

[AndreaLanfranchi]

Looking at https://github.com/RavenCommunity/kawpowminer/blob/master/libethash-cuda/CUDAMiner_kernel.cu#L33-L49

Capital R has been assigned hex code 0x72 which in reality is r (lower case)
Correct hex code should be 0x52.
Implementers iterating chars through string "RAVENCOINKAWPOW" get different constants thus have not matching results.

[AndreaLanfranchi]

An amendment of this implies amendment in verification tool thus on node and pool software

[blondfrogs]

Great find. I think at this moment we will just edit the comments to reflect rAVENCOIN. We have been able to get other miners already built and right now a change like this so close to the fork isn’t feasible. Great find! Luckily this doesn’t impact security

[AndreaLanfranchi]

Ok then.
As there's only this reference implementation for kawpow keep the issue open and pinned.