Add locking to getauxblock.
Add locking to getauxblock.

Previously, RPC calls were locked by default.  Now that this is changed,
add the necessary locks to cs_main manually.

namecoin/namecore,phelix/namecore,pataquets/namecoin-core,ixcoinofficialpage/master,brandonrobertz/namecoin-core,domob1812/namecore,domob1812/namecore,ahmedbodi/terracoin,phelix/namecore,josephbisch/namecoin-core,wiggi/huntercore,wiggi/huntercore,brandonrobertz/namecoin-core,domob1812/i0coin,namecoin/namecoin-core,namecoin/namecore,pataquets/namecoin-core,ahmedbodi/terracoin,40thoughts/Coin-QualCoin,ixcoinofficialpage/master,namecoin/namecoin-core,40thoughts/Coin-QualCoin,namecoin/namecoin-core,ahmedbodi/terracoin,Kcoin-project/kcoin,ixcoinofficialpage/master,40thoughts/Coin-QualCoin,josephbisch/namecoin-core,domob1812/namecore,Kcoin-project/kcoin,40thoughts/Coin-QualCoin,phelix/namecore,brandonrobertz/namecoin-core,brandonrobertz/namecoin-core,wiggi/huntercore,josephbisch/namecoin-core,wiggi/huntercore,domob1812/huntercore,Kcoin-project/kcoin,ixcoinofficialpage/master,domob1812/i0coin,brandonrobertz/namecoin-core,domob1812/huntercore,pataquets/namecoin-core,domob1812/namecore,josephbisch/namecoin-core,ahmedbodi/terracoin,phelix/namecore,pataquets/namecoin-core,josephbisch/namecoin-core,ixcoinofficialpage/master,wiggi/huntercore,domob1812/i0coin,domob1812/i0coin,namecoin/namecoin-core,Kcoin-project/kcoin,domob1812/huntercore,ahmedbodi/terracoin,namecoin/namecoin-core,domob1812/huntercore,domob1812/i0coin,phelix/namecore,namecoin/namecore,40thoughts/Coin-QualCoin,brandonrobertz/namecoin-core,Kcoin-project/kcoin,josephbisch/namecoin-core,Kcoin-project/kcoin,wiggi/huntercore,pataquets/namecoin-core,40thoughts/Coin-QualCoin,namecoin/namecoin-core,domob1812/namecore,domob1812/namecore,namecoin/namecore,namecoin/namecore,phelix/namecore,ahmedbodi/terracoin,domob1812/huntercore,ixcoinofficialpage/master,namecoin/namecore,domob1812/huntercore,pataquets/namecoin-core,domob1812/i0coin