both: prefer pkg-config over cmake in libevent

CMakeLists.txt

@@ -50,15 +50,15 @@ if (HAVE_OSSL_QUIC_CLIENT_METHOD)
 endif()
 unset(CMAKE_REQUIRED_LIBRARIES)
 
-find_package(Libevent 2.1.1 COMPONENTS core)
-if (Libevent_FOUND)
-    set(EVENT_CORE libevent::core)
-    include_directories(${LIBEVENT_INCLUDE_DIRS})
-else()
-    find_package(PkgConfig REQUIRED)
+find_package(PkgConfig QUIET)
+if (PkgConfig_FOUND)
     pkg_check_modules(LIBEVENT_CORE REQUIRED libevent_core>=2.1.1)
     set(EVENT_CORE ${LIBEVENT_CORE_LINK_LIBRARIES})
     include_directories(${LIBEVENT_CORE_INCLUDE_DIRS})
+else()
+    find_package(Libevent 2.1.1 REQUIRED COMPONENTS core)
+    set(EVENT_CORE libevent::core)
+    include_directories(${LIBEVENT_INCLUDE_DIRS})
 endif()
 
 add_executable(wss-proxy-client wss-proxy-client.c ws-header.c common.c wss-client.c)