[apr] add config for unofficial-apr package, that forwards to APR wit…

…h a warning.

* portfile.cmake
  (install): Copy unofficial-apr-config.cmake
* unofficial-apr-config.cmake: New config file for unofficial-apr package, that forwards to apr package and writes a warning.

ports/apr/portfile.cmake

@@ -36,6 +36,10 @@ if (VCPKG_TARGET_IS_WINDOWS)
 
     vcpkg_cmake_install()
     vcpkg_cmake_config_fixup(CONFIG_PATH "lib/cmake/apr")
+    file(
+        INSTALL "${CMAKE_CURRENT_LIST_DIR}/unofficial-apr-config.cmake"
+        DESTINATION "${CURRENT_PACKAGES_DIR}/share/unofficial-apr"
+    )
     # There is no way to suppress installation of the headers in debug builds.
     file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/debug/include")
 

ports/apr/unofficial-apr-config.cmake

@@ -0,0 +1,11 @@
+message(WARNING "find_package(unofficial-apr) is deprecated.\nUse find_package(apr) instead")
+include(CMakeFindDependencyMacro)
+find_dependency(apr CONFIG)
+
+if("${VCPKG_LIBRARY_LINKAGE}" "static")
+    add_library(unofficial::apr::apr-1 ALIAS apr::apr-1)
+    add_library(unofficial::apr::aprapp-1 ALIAS apr::aprapp-1)
+else()
+    add_library(unofficial::apr::libapr-1 ALIAS apr::libapr-1)
+    add_library(unofficial::apr::libaprapp-1 ALIAS apr::libaprapp-1)
+endif()