Create textlog session id from peerIP and peerPort

- because both textlog and mysql log create their own session id,
  and this way, there will be usefil data in textlog session id

from log/kippo-textfile.log:
127.0.0.1 23430 [2014-09-24 15:42:29]: Command [ls -la]

instead of

c651b69643f811e49f3f28924aca0368 [2014-09-24 15:41:00]: Command [ls -la]