Merge remote-tracking branch 'upstream/master'
fix initialization of digi modems.

- write_tone() works only for NET_KEYER and therefore calling it in the
  wrong context gave only an error resulting in switching back to SSB
  mode.
Merge branch 'master' of https://github.com/Tlf/tlf
Added new startup argument: '-r', which disables radio control
Modified automatic cq zone nr copy to comment variable, if that's not empty
Added extra check for exchange field for CQ-WW-RTTY
Modified automatic cq zone nr copy to comment variable, if that's not empty

- If the user modified the exchange field, which was filled out by Tlf from
  cty.dat, then Tlf rewrite the original value if switching bqack forth
  between call input and comemtn field.
Added extra check for exchange field for CQ-WW-RTTY

- CQWW RTTY contest requires the two letter province for US and Canada
  stations in the exchange.
Merged tlf.1.in from upstream
Merged tlf.1.in from upstream
Added '-r' description to manpage.
Fixed broken exchange field TAB press event
Fixed broken exchange field TAB press event
Added new startup argument: '-r', which disables radio control
Fixed broken exchange field TAB press event

- Even while the operator still has an incomplete comment field the fix
  allows to switch back and forth to the call input field
Fldigi carrier handling through XMLRPC
Added xmlrpc communitation to Fldigi, calculate the correct freq.
Added xmlrpc communitation to Fldigi, calculate the correct freq.
Added xmlrpc libs and headers to autotool file; added macros to source
Finished TRX freq shift calculation, which came from Fldigi, through XMLRPC