Update links to https.

www.openssh.com now supports https and ftp.openbsd.org no longer
supports ftp.  Make all links to these https.
diff --git a/buildpkg.sh.in b/buildpkg.sh.in
index 4b842b3..4ccc5f8 100644
--- a/buildpkg.sh.in
+++ b/buildpkg.sh.in
@@ -247,7 +247,7 @@
 PKG=$PKGNAME
 NAME="OpenSSH Portable for ${UNAME_S}"
 DESC="Secure Shell remote access utility; replaces telnet and rlogin/rsh."
-VENDOR="OpenSSH Portable Team - http://www.openssh.com/portable.html"
+VENDOR="OpenSSH Portable Team - https://www.openssh.com/portable.html"
 ARCH=$ARCH
 VERSION=$VERSION$REV
 CATEGORY="Security,application"