doc: Explain effects of -prune=<n> parameter in release notes
doc: Explain effects of -prune=<n> parameter in release notes

As discussed in the mailing list thread:
    [bitcoin-dev] Bitcoin Core 0.12.0 release candidate 1 available
in the replies to this message:
http://lists.linuxfoundation.org/pipermail/bitcoin-dev/2016-January/012276.html

Please review thoroughly, I'm a newbie.

BTCfork/hardfork_prototype_1_mvf-core,Kore-Core/kore,gjhiggins/vcoincore,ivansib/sibcoin,dmrtsvetkov/flowercoin,worldbit/worldbit,goku1997/bitcoin,krzysztofwos/BitcoinUnlimited,BitcoinUnlimited/BitcoinUnlimited,Kore-Core/kore,bitcoinclassic/bitcoinclassic,Kore-Core/kore,bitcoinclassic/bitcoinclassic,RyanLucchese/energi,terracoin/terracoin,ftrader-bitcoinunlimited/hardfork_prototype_1_mvf-bu,schinzelh/dash,worldbit/worldbit,argentumproject/argentum,faircoin/faircoin,SartoNess/BitcoinUnlimited,dmrtsvetkov/flowercoin,marcusdiaz/BitcoinUnlimited,dgenr8/bitcoin,Flurbos/Flurbo,ediston/energi,Kore-Core/kore,marlengit/hardfork_prototype_1_mvf-bu,myriadcoin/myriadcoin,BTCfork/hardfork_prototype_1_mvf-bu,bitcoinclassic/bitcoinclassic,worldbit/worldbit,thelazier/dash,dgenr8/bitcoin,Flurbos/Flurbo,zsulocal/bitcoin,ivansib/sibcoin,multicoins/marycoin,BTCfork/hardfork_prototype_1_mvf-core,multicoins/marycoin,multicoins/marycoin,adpg211/bitcoin-master,lclc/bitcoin,PandaPayProject/PandaPay,rsdevgun16e/energi,BlockchainTechLLC/3dcoin,zander/bitcoinclassic,marcusdiaz/BitcoinUnlimited,Flurbos/Flurbo,diggcoin/diggcoin,faircoin/faircoin,aspirecoin/aspire,worldbit/worldbit,HeliumGas/helium,RyanLucchese/energi,marcusdiaz/BitcoinUnlimited,myriadcoin/myriadcoin,thelazier/dash,aspirecoin/aspire,BlockchainTechLLC/3dcoin,argentumproject/argentum,zander/bitcoinclassic,adpg211/bitcoin-master,aspirecoin/aspire,UdjinM6/dash,arruah/ensocoin,multicoins/marycoin,rsdevgun16e/energi,ftrader-bitcoinunlimited/hardfork_prototype_1_mvf-bu,BlockchainTechLLC/3dcoin,rdqw/sscoin,terracoin/terracoin,ionomy/ion,janko33bd/bitcoin,thelazier/dash,Justaphf/BitcoinUnlimited,ionomy/ion,aspirecoin/aspire,bitcoinclassic/bitcoinclassic,jaromil/faircoin2,janko33bd/bitcoin,rsdevgun16e/energi,Petr-Economissa/gvidon,Bitcoin-com/BUcash,lakepay/lake,marlengit/BitcoinUnlimited,biblepay/biblepay,marlengit/BitcoinUnlimited,dgenr8/bitcoin,aspirecoin/aspire,SartoNess/BitcoinUnlimited,zsulocal/bitcoin,deadalnix/bitcoin,ftrader-bitcoinunlimited/hardfork_prototype_1_mvf-bu,bitpay/bitcoin,Bitcoin-com/BUcash,jaromil/faircoin2,Flurbos/Flurbo,bitcoinclassic/bitcoinclassic,crowning-/dash,AllanDoensen/BitcoinUnlimited,multicoins/marycoin,RyanLucchese/energi,myriadcoin/myriadcoin,multicoins/marycoin,BlockchainTechLLC/3dcoin,marcusdiaz/BitcoinUnlimited,krzysztofwos/BitcoinUnlimited,BTCfork/hardfork_prototype_1_mvf-core,rdqw/sscoin,rdqw/sscoin,myriadcoin/myriadcoin,Bitcoin-com/BUcash,SartoNess/BitcoinUnlimited,faircoin/faircoin2,gjhiggins/vcoincore,ivansib/sib16,zsulocal/bitcoin,Justaphf/BitcoinUnlimited,marlengit/BitcoinUnlimited,UdjinM6/dash,zetacoin/zetacoin,zsulocal/bitcoin,Bitcoin-com/BUcash,UdjinM6/dash,jmgilbert2/energi,HeliumGas/helium,projectinterzone/ITZ,worldbit/worldbit,nmarley/dash,diggcoin/diggcoin,deadalnix/bitcoin,biblepay/biblepay,ftrader-bitcoinunlimited/hardfork_prototype_1_mvf-bu,arruah/ensocoin,zsulocal/bitcoin,marlengit/BitcoinUnlimited,crowning-/dash,ediston/energi,Justaphf/BitcoinUnlimited,cddjr/BitcoinUnlimited,BTCfork/hardfork_prototype_1_mvf-bu,myriadteam/myriadcoin,crowning-/dash,crowning-/dash,Petr-Economissa/gvidon,SartoNess/BitcoinUnlimited,biblepay/biblepay,dashpay/dash,gjhiggins/vcoincore,adpg211/bitcoin-master,ionomy/ion,SartoNess/BitcoinUnlimited,Bitcoin-com/BUcash,projectinterzone/ITZ,nmarley/dash,dgenr8/bitcoin,arruah/ensocoin,cddjr/BitcoinUnlimited,marcusdiaz/BitcoinUnlimited,projectinterzone/ITZ,terracoin/terracoin,willwray/dash,rsdevgun16e/energi,jmgilbert2/energi,myriadcoin/myriadcoin,AllanDoensen/BitcoinUnlimited,marlengit/hardfork_prototype_1_mvf-bu,PandaPayProject/PandaPay,marlengit/BitcoinUnlimited,faircoin/faircoin,zetacoin/zetacoin,lclc/bitcoin,dmrtsvetkov/flowercoin,jmgilbert2/energi,deadalnix/bitcoin,adpg211/bitcoin-master,dmrtsvetkov/flowercoin,jaromil/faircoin2,bitcoinclassic/bitcoinclassic,faircoin/faircoin2,krzysztofwos/BitcoinUnlimited,dashpay/dash,BitcoinUnlimited/BitcoinUnlimited,ediston/energi,jmgilbert2/energi,lclc/bitcoin,argentumproject/argentum,zetacoin/zetacoin,jaromil/faircoin2,BTCfork/hardfork_prototype_1_mvf-bu,terracoin/terracoin,ivansib/sib16,dmrtsvetkov/flowercoin,diggcoin/diggcoin,BitcoinUnlimited/BitcoinUnlimited,bitpay/bitcoin,BitcoinUnlimited/BitcoinUnlimited,schinzelh/dash,Justaphf/BitcoinUnlimited,dashpay/dash,rdqw/sscoin,willwray/dash,ivansib/sib16,gjhiggins/vcoincore,argentumproject/argentum,ediston/energi,jmgilbert2/energi,HeliumGas/helium,RyanLucchese/energi,Kore-Core/kore,willwray/dash,bitpay/bitcoin,AllanDoensen/BitcoinUnlimited,AllanDoensen/BitcoinUnlimited,faircoin/faircoin2,SartoNess/BitcoinUnlimited,nmarley/dash,dashpay/dash,biblepay/biblepay,adpg211/bitcoin-master,ftrader-bitcoinunlimited/hardfork_prototype_1_mvf-bu,ivansib/sib16,Petr-Economissa/gvidon,gjhiggins/vcoincore,ediston/energi,zsulocal/bitcoin,goku1997/bitcoin,arruah/ensocoin,Flurbos/Flurbo,marlengit/hardfork_prototype_1_mvf-bu,faircoin/faircoin,projectinterzone/ITZ,goku1997/bitcoin,diggcoin/diggcoin,AllanDoensen/BitcoinUnlimited,zander/bitcoinclassic,lclc/bitcoin,rsdevgun16e/energi,BTCfork/hardfork_prototype_1_mvf-core,faircoin/faircoin2,marlengit/hardfork_prototype_1_mvf-bu,PandaPayProject/PandaPay,krzysztofwos/BitcoinUnlimited,alejandromgk/Lunar,Kore-Core/kore,biblepay/biblepay,argentumproject/argentum,dgenr8/bitcoin,marlengit/hardfork_prototype_1_mvf-bu,BTCfork/hardfork_prototype_1_mvf-bu,schinzelh/dash,ftrader-bitcoinunlimited/hardfork_prototype_1_mvf-bu,nmarley/dash,crowning-/dash,jaromil/faircoin2,goku1997/bitcoin,rsdevgun16e/energi,diggcoin/diggcoin,PandaPayProject/PandaPay,alejandromgk/Lunar,janko33bd/bitcoin,Flurbos/Flurbo,zander/bitcoinclassic,myriadteam/myriadcoin,gjhiggins/vcoincore,argentumproject/argentum,schinzelh/dash,HeliumGas/helium,Justaphf/BitcoinUnlimited,krzysztofwos/BitcoinUnlimited,Petr-Economissa/gvidon,BlockchainTechLLC/3dcoin,lakepay/lake,willwray/dash,Petr-Economissa/gvidon,ionomy/ion,BTCfork/hardfork_prototype_1_mvf-core,faircoin/faircoin,schinzelh/dash,arruah/ensocoin,rdqw/sscoin,ionomy/ion,SartoNess/BitcoinUnlimited,Bitcoin-com/BUcash,schinzelh/dash,deadalnix/bitcoin,zetacoin/zetacoin,willwray/dash,dashpay/dash,lclc/bitcoin,krzysztofwos/BitcoinUnlimited,ionomy/ion,biblepay/biblepay,Justaphf/BitcoinUnlimited,ivansib/sibcoin,HeliumGas/helium,zetacoin/zetacoin,ivansib/sibcoin,myriadteam/myriadcoin,jaromil/faircoin2,RyanLucchese/energi,thelazier/dash,biblepay/biblepay,ivansib/sibcoin,ediston/energi,BitcoinUnlimited/BitcoinUnlimited,BTCfork/hardfork_prototype_1_mvf-bu,adpg211/bitcoin-master,lakepay/lake,goku1997/bitcoin,crowning-/dash,aspirecoin/aspire,worldbit/worldbit,projectinterzone/ITZ,lclc/bitcoin,myriadteam/myriadcoin,cddjr/BitcoinUnlimited,PandaPayProject/PandaPay,biblepay/biblepay,lakepay/lake,cddjr/BitcoinUnlimited,janko33bd/bitcoin,ivansib/sib16,ivansib/sibcoin,BTCfork/hardfork_prototype_1_mvf-core,PandaPayProject/PandaPay,deadalnix/bitcoin,deadalnix/bitcoin,bitpay/bitcoin,RyanLucchese/energi,nmarley/dash,myriadcoin/myriadcoin,thelazier/dash,alejandromgk/Lunar,alejandromgk/Lunar,nmarley/dash,myriadteam/myriadcoin,BlockchainTechLLC/3dcoin,diggcoin/diggcoin,cddjr/BitcoinUnlimited,zander/bitcoinclassic,marcusdiaz/BitcoinUnlimited,UdjinM6/dash,lakepay/lake,goku1997/bitcoin,janko33bd/bitcoin,HeliumGas/helium,zander/bitcoinclassic,willwray/dash,myriadteam/myriadcoin,marlengit/BitcoinUnlimited,BitcoinUnlimited/BitcoinUnlimited,zetacoin/zetacoin,jmgilbert2/energi,ivansib/sib16,marlengit/hardfork_prototype_1_mvf-bu,AllanDoensen/BitcoinUnlimited,terracoin/terracoin,faircoin/faircoin,faircoin/faircoin2,dmrtsvetkov/flowercoin,bitpay/bitcoin,alejandromgk/Lunar,nmarley/dash,Petr-Economissa/gvidon,bitpay/bitcoin,terracoin/terracoin,lakepay/lake,faircoin/faircoin2,BTCfork/hardfork_prototype_1_mvf-bu,arruah/ensocoin,rdqw/sscoin,alejandromgk/Lunar,argentumproject/argentum,UdjinM6/dash,janko33bd/bitcoin,cddjr/BitcoinUnlimited