added 99 as special number for no processes

lbry/console.py

@@ -88,7 +88,7 @@ class Basic(Console):
             s.append('Full Node')
         elif isinstance(self.service, LightClient):
             s.append('Light Client')
-        if conf.processes == -1:
+        if conf.processes in (-1, 99):
             s.append('Threads Only')
         elif conf.processes == 0:
             s.append(f'{os.cpu_count()} Process(es)')

lbry/db/database.py

@@ -162,7 +162,7 @@ class Database:
                 self.message_queue, self.stop_event
             )
         }
-        if self.processes > 1:
+        if self.processes > 1 and self.processes != 99:
             self.executor = ProcessPoolExecutor(max_workers=self.processes, **kwargs)
         else:
             self.executor = ThreadPoolExecutor(max_workers=1, **kwargs)