Update networking layer w/ CURL and emscripten impl

External/curl-8.17.0/docs/libcurl/opts/CMakeLists.txt

@@ -0,0 +1,37 @@
+#***************************************************************************
+#                                  _   _ ____  _
+#  Project                     ___| | | |  _ \| |
+#                             / __| | | | |_) | |
+#                            | (__| |_| |  _ <| |___
+#                             \___|\___/|_| \_\_____|
+#
+# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# This software is licensed as described in the file COPYING, which
+# you should have received as part of this distribution. The terms
+# are also available at https://curl.se/docs/copyright.html.
+#
+# You may opt to use, copy, modify, merge, publish, distribute and/or sell
+# copies of the Software, and permit persons to whom the Software is
+# furnished to do so, under the terms of the COPYING file.
+#
+# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+# KIND, either express or implied.
+#
+# SPDX-License-Identifier: curl
+#
+###########################################################################
+# Get man_MANS variable
+curl_transform_makefile_inc("Makefile.inc" "${CMAKE_CURRENT_BINARY_DIR}/Makefile.inc.cmake")
+include("${CMAKE_CURRENT_BINARY_DIR}/Makefile.inc.cmake")
+
+curl_add_manual_pages(man_MANS)
+add_custom_target(curl-opts-man DEPENDS ${man_MANS})
+add_dependencies(curl-man curl-opts-man)
+if(NOT CURL_DISABLE_INSTALL)
+  set(_src "")
+  foreach(_file IN LISTS man_MANS)
+    list(APPEND _src "${CMAKE_CURRENT_BINARY_DIR}/${_file}")
+  endforeach()
+  install(FILES ${_src} DESTINATION "${CMAKE_INSTALL_MANDIR}/man3")
+endif()