repmgrd: activate inactive node record at startup

If a PostgreSQL instance was shut down while repmgrd was running, and
repmgrd was subsequently restarted (this chain of events could occur
during e.g. a server reboot), the node record will have been set to
"inactive". Previously, in this case repmgrd would refuse to start up.
However, as we can determine the node is running, it should normally
be no problem to automatically set the node record to "active".

The old behaviour can be restored by setting the new parameter
"repmgrd_exit_on_inactive_node" to "true".

RM19604.

repmgrd-physical.h

@@ -19,7 +19,7 @@
 #ifndef _REPMGRD_PHYSICAL_H_
 #define _REPMGRD_PHYSICAL_H_
 
-void		do_physical_node_check(void);
+void		do_physical_node_check(PGconn *conn);
 
 void		monitor_streaming_primary(void);
 void		monitor_streaming_standby(void);