main/wget: upgrade to 2.0.0

https://lists.gnu.org/archive/html/info-gnu/2021-09/msg00011.html

OTOH maybe better to use !25846 (merged) as Ubuntu 21.10 doing

tests require community/libmicrohttpd as --without-libmicrohttpd does not work

libtest.c:47:10: fatal error: microhttpd.h: No such file or directory
   47 | #include <microhttpd.h>