Alphabetize subsystem loggers.
Alphabetize subsystem loggers.

This commit simply alphabetizes the subsystem logger variables, map, and
use switch so the order in the code is consistent with the sorted output
displayed when using --debuglevel.

soapboxsys/ombfullnode,btcsuite/btcd,1d4Nf6/btcd,ppcsuite/ppcd,decred/dcrd,wallclockbuilder/btcd,tb00/btcd,btcsuitereleases/btcd,mathiasrw/btcd,btcsuitereleases/btcd,jrick/dcrd,tb00/btcd,BitGo/prova,1d4Nf6/btcd,cjepson/btcd,FactomProject/btcd,glv2/ppcd,ltcsuite/ltcd,stevenroose/btcd,runeaune/btcd,sysbot/btcd,hectorj/btcd,ltcsuite/ltcd,jrick/btcd,FactomProject/btcd,dan-da/btcd,Evil-Coin/Evil,jongillham/btcd,Evil-Coin/Evil,jimmysong/btcd,Cleawing/btcd,Roasbeef/btcd,Stash-Crypto/btcd,jcmincke/dcrd,ppcsuite/ppcd,dajohi/btcd,dajohi/btcd,DanielKrawisz/btcd,DanielKrawisz/btcd,dan-da/btcd,wallclockbuilder/btcd,cqswxj2013/btcd,Dirbaio/btcd,ppcsuite/ppcd-old,aakselrod/btcd,danoctavian/btcd,jrick/btcd,BitGo/prova,CryptocurrencyCabal/htcd,aakselrod/btcd,decred/dcrd,davecgh/btcd,Stash-Crypto/btcd,Dirbaio/btcd,Dirbaio/btcd,jcmincke/dcrd,hectorj/btcd,jcmincke/dcrd,Roasbeef/btcd,cjepson/btcd,sysbot/btcd,cqswxj2013/btcd,jongillham/btcd,qchain/btcd,toddfries/btcd,btcsuite/btcd,jrick/btcd,adiabat/btcd,ppcsuite/ppcd-old,pkothbauer/btcd,mathiasrw/btcd,stevenroose/btcd,soapboxsys/ombfullnode,Cleawing/btcd,toddfries/btcd,davecgh/btcd,danoctavian/btcd,adiabat/btcd,jrick/dcrd,CryptocurrencyCabal/htcd,jimmysong/btcd,runeaune/btcd,dajohi/btcd,pkothbauer/btcd,glv2/ppcd,qchain/btcd