Compatibility with old perforce servers

- P4ChangeStatusCommand, P4IncommingCommand : on Run(...) function, fstat command will just retrieve all the information, since "-T" is not supported by old perforce servers.
- P4StatusCommand: on RunAndSend(...) function, fstat command will just retrieve all the information, since "-T" is not supported by old perforce servers.
- P4LoginCommand: on OutputInfo(...), avoided problems when authenticate with P4PASSWORD env variable and got a warning about login with a password instead of a ticket ( old perforce servers ).