Let's Encrypt client imported into -current

Kristaps Dzonsons' Let's Encrypt client, letskencrypt, has been imported into OpenBSD-current as acme-client.

letskencrypt, which has previously been available as a port, is a privilege-separated Let's Encrypt (ACME protocol) client written in C.

Florian Obser (florian@) committed the import:

CVSROOT:	/cvs
Module name:	src
Changes by:	florian@cvs.openbsd.org	2016/08/31 16:01:42

Added files:
	usr.sbin/acme-client: ChangeLog Makefile acctproc.c base64.c 
	                      certproc.c chngproc.c dbg.c dnsproc.c 
	                      extern.h fileproc.c http.c http.h jsmn.c 
	                      jsmn.h json.c keyproc.c letskencrypt.1 
	                      main.c netproc.c revokeproc.c rsa.c rsa.h 
	                      sandbox-pledge.c util-pledge.c util.c 

Log message:
Import Kristaps' letskencrypt and call it acme-client in tree.
OK to get it in deraadt@ (and probably beck@)

At least deraadt@, beck@ and otto@ are fine with the name and the
disagreements stopped.

The (main) OpenBSD web site recently added HTTPS support and, at the time of writing, uses a certificate issued by Let's Encrypt.