Embedded lock in to server struct
add optional whitelisting of fingerprints for connecting
clean up duplicate commands in OP_HELP_TEXT
Merge pull request #32 from jazzychad/whitelist

add optional whitelisting of fingerprints for connecting
Merge pull request #36 from jazzychad/clean_op_cmds

clean up duplicate commands in OP_HELP_TEXT
Merge pull request #33 from voldyman/master

Embedded lock in to server struct