Squashed commit of the following:

commit ebdef2b73d5c600c6082dbf07913d3d9e7c148ed
Author: Simon <simon@gb7fr.org.uk>
Date:   Wed Oct 20 00:35:17 2021 +0100

    unit

commit 8ed0b8df8f3ff74e11e5828228b77ccf1567c73d
Author: Simon <simon@gb7fr.org.uk>
Date:   Wed Oct 20 00:33:34 2021 +0100

    Tyo

commit 73151e08b14a100f4240ded2a58f5ff9c80ebc74
Author: Simon <simon@gb7fr.org.uk>
Date:   Wed Oct 20 00:24:27 2021 +0100

    Add rewrite for D-APRS Private Call to Group Call

bridge_master.py

@@ -1760,7 +1760,7 @@ class routerHBP(HBSYSTEM):
         _int_dst_id = int_id(_dst_id)
         
         #Handle private calls (for reflectors)
-        if _call_type == 'unit':
+        if _call_type == 'unit' and _slot == 2 and int_id(_dst_id) != 234999:
             if (_stream_id != self.STATUS[_slot]['RX_STREAM_ID']):
                 
                 self.STATUS[_slot]['_stopTgAnnounce'] = False
@@ -1828,7 +1828,7 @@ class routerHBP(HBSYSTEM):
             if (_frame_type == HBPF_DATA_SYNC) and (_dtype_vseq == HBPF_SLT_VTERM) and (self.STATUS[_slot]['RX_TYPE'] != HBPF_SLT_VTERM):
                 
                 #Speak callsign before message
-                _say = [words[_lang]['silence']]
+        #        _say = [words[_lang]['silence']]
         #        _systemcs = re.sub(r'\W+', '', self._system)
          #       _systemcs.upper()
           #      for character in _systemcs:
@@ -1839,6 +1839,8 @@ class routerHBP(HBSYSTEM):
                     logger.info('(%s) Reflector: voice called - TG < 5 or 9 - "busy""', self._system)
                     _say.append(words[_lang]['busy'])
                     _say.append(words[_lang]['silence'])
+                    _say.append(words[_lang]['notlinked'])
+                    _say.append(words[_lang]['silence'])
                     self.STATUS[_slot]['_stopTgAnnounce'] = True
                 
                 #If disconnection called
@@ -1909,9 +1911,12 @@ class routerHBP(HBSYSTEM):
             self.STATUS[_slot]['RX_TIME']      = pkt_time
             self.STATUS[_slot]['RX_STREAM_ID'] = _stream_id    
         
+        #Placeholder for slot 1 unit calls
+        if _call_type == 'unit' and _slot == 1:
+            pass
 
         #Handle group calls
-        if _call_type == 'group' or _call_type == 'vcsbk':
+        if _call_type == 'group' or _call_type == 'vcsbk' or (_call_type == 'unit' and int_id(_dst_id) == 234999):
 
             # Is this a new call stream?
             if (_stream_id != self.STATUS[_slot]['RX_STREAM_ID']):
@@ -1927,7 +1932,8 @@ class routerHBP(HBSYSTEM):
                     self._report.send_bridgeEvent('GROUP VOICE,START,RX,{},{},{},{},{},{}'.format(self._system, int_id(_stream_id), int_id(_peer_id), int_id(_rf_src), _slot, int_id(_dst_id)).encode(encoding='utf-8', errors='ignore'))
 
                 # If we can, use the LC from the voice header as to keep all options intact
-                if _frame_type == HBPF_DATA_SYNC and _dtype_vseq == HBPF_SLT_VHEAD:
+                # If we see a unit call to the private ID used for D-APRS, rewrite to a group call.
+                if _frame_type == HBPF_DATA_SYNC and _dtype_vseq == HBPF_SLT_VHEAD and int_id(_dst_id) != 234999:
                     decoded = decode.voice_head_term(dmrpkt)
                     self.STATUS[_slot]['RX_LC'] = decoded['LC']