Fix proxy unlocking

src/lib/proxy.c

@@ -139,10 +139,9 @@ proxy_ctx_t *proxy_get_by_conf(host_config_t *conf) {
 
 void proxy_unlock_ctx(proxy_ctx_t *ctx) {
     int n = (int) ((ctx - proxies) / MAX_PROXY_CNX_PER_HOST);
-    int was_in_use = ctx->in_use;
     ctx->in_use = 0;
     ctx->client = NULL;
-    if (was_in_use) sem_post(&available[n]);
+    sem_post(&available[n]);
 }
 
 int proxy_request_header(http_req *req, sock *sock) {

src/worker/fastcgi_handler.c

@@ -148,7 +148,7 @@ static int fastcgi_handler_1(client_ctx_t *ctx, fastcgi_cnx_t **fcgi_cnx) {
 }
 
 static void fastcgi_next_cb(chunk_ctx_t *ctx) {
-    if(ctx->client->fcgi_ctx) {
+    if (ctx->client->fcgi_ctx) {
         fastcgi_close(ctx->client->fcgi_ctx);
         ctx->client->fcgi_ctx = NULL;
     }

src/worker/ws_frame_handler.c

@@ -88,6 +88,7 @@ void ws_close(ws_ctx_t *ctx) {
         logger_set_prefix("[%*s]%s", ADDRSTRLEN, ctx->client->socket.s_addr, ctx->client->log_prefix);
         info("Closing WebSocket connection");
         proxy_close(ctx->client->proxy);
+        proxy_unlock_ctx(ctx->client->proxy);
         tcp_close(ctx->client);
     }
     free(ctx);