rdp_try appears to introduce regression in regular mode.  'ftp ls' doesn't appear to ack correctly.

Revert "Merge pull request #30 from ArduSat/rdp_try"

This reverts commit fbb5b1295d2e35626a0c46e67cc127e5e90a9090, reversing
changes made to 3ec9f6f38c4e1ceaf37a289ce39b5464a7dd4d21.