Fix mail/qpopper:
- remove MASTER_SITE ftp.qualcomm.com that is no more
and add a couple of living distfile sources;
- describe custom BSD-style Quallcom license for the distfile;
- fix building with openssl-1.1.1 that no longer has SSLv2 support
plus made struct ssl_st (SSL) completely opaque, so better use
public interface SSL_session_reused() instead of direct access
to now hidden "hit" part of struct; this works for previous
openssl versions too.
No PORTREVISION bump as this fixed package building for FreeBSD 12+
and has no visible package changes for other supported branches.
PR: 232383
Reported by: sbruno
Approved by: bc979@lafn.org (maintainer timeout, 4 weeks)