[conformal/btcd] d2bfd3: Alphabetize subsystem loggers.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcd
  Commit: d2bfd3d98b5eb556cac85cb18e1610c4091a2e2b
      
https://github.com/conformal/btcd/commit/d2bfd3d98b5eb556cac85cb18e1610c4091a2e2b
  Author: Dave Collins <da...@conformal.com>
  Date:   2014-03-01 (Sat, 01 Mar 2014)

  Changed paths:
    M log.go

  Log Message:
  -----------
  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.