Description of problem:
In remote control mode of guestfish, the server will normally exit if there is an error in a command. guestfish man page said if we prefix a command with a - character, then that command will not cause guestfish to exit,
but this doesn't work in remote control mode, seems the prefixal '-' in sub-command won't be handled by guestfish.

Version-Release number of selected component (if applicable):
guestfish-1.0.85-1.fc12.3

How reproducible:
100%

Steps to Reproduce:

1. $ eval `guestfish --listen`
2. $ guestfish --remote version
major: 1
minor: 0
release: 85
extra: 
3. $ guestfish --remote -- -lvs
-lvs: unknown command
4. $ guestfish --remote version
guestfish: remote: looks like the server is not running
  
Actual results:
'-' prefixed sub-commands is not recognized by guestfish, and this will cause the guestfish server exit in remote control mode.

Expected results:
sub-commands which prefixed with '-' character should be recognized by guestfish, and this should make guestfish ignore the errors of commands even in remote control mode.

Additional info: