refactor(userspace/falco): support zlib and custom threadiness in webserver

Signed-off-by: Jason Dellaluce <jasondellaluce@gmail.com>

userspace/falco/webserver.cpp

@@ -15,6 +15,7 @@ limitations under the License.
 */
 
 #include "webserver.h"
+#include "falco_utils.h"
 #include <atomic>
 
 falco_webserver::~falco_webserver()
@@ -46,6 +47,10 @@ void falco_webserver::start(
         m_server = new httplib::Server();
     }
 
+    // configure server
+    auto threadiness = std::min(2u, falco::utils::hardware_concurrency());
+    m_server->new_task_queue = [&threadiness] { return new httplib::ThreadPool(threadiness); };
+
     // setup healthz endpoint
     m_server->Get(healthz_endpoint,
         [](const httplib::Request &, httplib::Response &res) {

userspace/falco/webserver.h

@@ -16,6 +16,7 @@ limitations under the License.
 #pragma once
 
 #define CPPHTTPLIB_OPENSSL_SUPPORT
+#define CPPHTTPLIB_ZLIB_SUPPORT
 #include <httplib.h>
 #include <thread>
 #include "configuration.h"