cmake LWS_HAVE_GETGRNAM_R examples

warmcat/libwebsockets CMakeLists.txt :665 

CHECK_FUNCTION_EXISTS(getgrnam_r LWS_HAVE_GETGRNAM_R)

c-jimenez/open-ocpp 3rdparty/libwebsockets/CMakeLists.txt :589 

CHECK_FUNCTION_EXISTS(getgrnam_r LWS_HAVE_GETGRNAM_R)

fluffos/fluffos src/thirdparty/libwebsockets/CMakeLists.txt :572 

CHECK_FUNCTION_EXISTS(getgrnam_r LWS_HAVE_GETGRNAM_R)