required version of autoconf can be lower
required version of autoconf can be lower

tvanderbruggen/libwebsockets,davidgaleano/libwebsockets,tvanderbruggen/libwebsockets,davidgaleano/libwebsockets,davidgaleano/libwebsockets,tvanderbruggen/libwebsockets,tvanderbruggen/libwebsockets,davidgaleano/libwebsockets,tvanderbruggen/libwebsockets