uacme: add package

lightweight client for the RFC8555 ACMEv2 protocol, written in plain C code
with minimal dependencies (libcurl and one of GnuTLS, OpenSSL or mbedTLS).

Signed-off-by: Lucian Cristian <lucian.cristian@gmail.com>

net/uacme/files/acme.config

@@ -0,0 +1,14 @@
+config acme
+       option state_dir '/etc/acme'
+       option account_email 'email@example.org'
+       option debug 0
+
+config cert 'example'
+       option enabled 0
+       option use_staging 1
+       option keylength 2048
+       option update_uhttpd 1
+       option update_nginx 1
+       option update_haproxy 1
+       option webroot "/www/.well-known/acme-challenge"
+       list domains example.org