Fix new crash when recycling introduced in 0cc5b594

active_clients is destroyed in cleanup(), so it must be re-initialized inside
the server init/recycle loop.

src/sbbs3/ftpsrvr.c

@@ -6049,9 +6049,10 @@ void DLLCALL ftp_server(void* arg)
 	startup->shutdown_now=FALSE;
 	terminate_server=FALSE;
 	protected_uint32_init(&thread_count, 0);
-	protected_uint32_init(&active_clients, 0);
 
 	do {
+		protected_uint32_init(&active_clients, 0);
+
 		/* Setup intelligent defaults */
 		if(startup->port==0)					startup->port=IPPORT_FTP;
 		if(startup->qwk_timeout==0)				startup->qwk_timeout=FTP_DEFAULT_QWK_TIMEOUT;		/* seconds */

src/sbbs3/mailsrvr.c

@@ -6012,9 +6012,10 @@ void DLLCALL mail_server(void* arg)
 
 	SetThreadName("sbbs/mailServer");
 	protected_uint32_init(&thread_count, 0);
-	protected_uint32_init(&active_clients, 0);
 
 	do {
+		protected_uint32_init(&active_clients, 0);
+
 		/* Setup intelligent defaults */
 		if(startup->relay_port==0)				startup->relay_port=IPPORT_SMTP;
 		if(startup->submission_port==0)			startup->submission_port=IPPORT_SUBMISSION;

src/sbbs3/websrvr.c

@@ -6954,9 +6954,10 @@ void DLLCALL web_server(void* arg)
 	startup->shutdown_now=FALSE;
 	terminate_server=FALSE;
 	protected_uint32_init(&thread_count, 0);
-	protected_uint32_init(&active_clients,0);
 
 	do {
+		protected_uint32_init(&active_clients,0);
+
 		/* Setup intelligent defaults */
 		if(startup->port==0)					startup->port=IPPORT_HTTP;
 		if(startup->root_dir[0]==0)				SAFECOPY(startup->root_dir,WEB_DEFAULT_ROOT_DIR);