name the FlagSet for the shell and add a version flag

[neonstalwart]

i don't know if you want this but it took very little effort and i thought it was useful to have another way to get the version of the install

> influx -version
InfluxDB shell 0.9

> influx -h
Usage of InfluxDB REPL version 0.9:
  -database="": database to connect to the server.
  -dump=false: dump the contents of the given database to stdout
  -execute="": Execute command and quit.
  -host="localhost": influxdb host to connect to
  -output="column": format specifies the format of the server responses:  json, csv, or column
  -password="": password to connect to the server.  Leaving blank will prompt for password (--password="")
  -port=8086: influxdb port to connect to
  -username="": username to connect to the server.
  -version=false: Displays the InfluxDB version.

[otoolep]

Thanks @neonstalwart -- you know you can do influxd version, right?

[otoolep]

$ ./influxd version
[srvr] 2015/05/06 12:29:29 InfluxDB v0.9 (git: unknown)

[neonstalwart]

@otoolep yes, i discovered that while adding this 😄 but for some reason i couldn't find it when i wanted it before i did this

[neonstalwart]

so, the one new thing i added here is a better description for the FlagSet. that's got to be worth something 😉

[corylanou]

@neonstalwart the usage was recently redone to be clearer and more accurate as the basic usage that Go puts out is not accurate.

See #2603

Feel free to rebase and add this new flag there (or update usage to show how to use the existing option that already existed).

Thanks!

[neonstalwart]

@corylanou rebased

[corylanou]

+1

[toddboom]

+1