ppp: Add pam and openssl via packageconfig

Explicitly enable pam support, otherwise it goes into
detection mode and ends up poking at build host

Turn openssl into packageconfig as well

cc1: warning: include location "/usr/include" is unsafe for cross-compilation [-Wpoison-system-directories]
conftest.c: In function 'main':
conftest.c:68:1: warning: argument 1 null where non-null expected [-Wnonnull]
   68 | pam_authenticate(NULL, 0);
      | ^~~~~~~~~~~~~~~~
In file included from conftest.c:63:
/usr/include/security/pam_appl.h:38:1: note: in a call to function 'pam_authenticate' declared 'nonnull'
   38 | pam_authenticate(pam_handle_t *pamh, int flags);
      | ^~~~~~~~~~~~~~~~

(From OE-Core rev: 9b0c69a0bac18627cc6190f64bf9cabc518e4777)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/ppp/ppp_2.5.1.bb

@@ -4,7 +4,7 @@ the Point-to-Point Protocol (PPP) on Linux and Solaris systems."
 SECTION = "console/network"
 HOMEPAGE = "http://samba.org/ppp/"
 BUGTRACKER = "http://ppp.samba.org/cgi-bin/ppp-bugs"
-DEPENDS = "libpcap openssl virtual/crypt"
+DEPENDS = "libpcap virtual/crypt"
 LICENSE = "BSD-3-Clause & BSD-3-Clause-Attribution & GPL-2.0-or-later & LGPL-2.0-or-later & PD & RSA-MD & MIT"
 LIC_FILES_CHKSUM = "file://pppd/ccp.c;beginline=1;endline=29;md5=1bea10e81fc6f2df105b1f8b733cb149 \
                     file://pppd/plugins/passprompt.c;beginline=1;endline=10;md5=3bcbcdbf0e369c9a3e0b8c8275b065d8 \
@@ -27,9 +27,11 @@ SRC_URI = "https://download.samba.org/pub/${BPN}/${BP}.tar.gz \
 
 SRC_URI[sha256sum] = "733b7f5840b613da4eab0429a5081293275f06ba8b528e1b8eea6964faf0243a"
 
-inherit autotools systemd
+inherit autotools pkgconfig systemd
 
-EXTRA_OECONF += "--with-openssl=${STAGING_EXECPREFIXDIR}"
+PACKAGECONFIG = "${@bb.utils.filter('DISTRO_FEATURES', 'pam', d)} openssl"
+PACKAGECONFIG[pam] = "--with-pam=yes,--with-pam=no,libpam"
+PACKAGECONFIG[openssl] = "--with-openssl=yes,--with-openssl=no,openssl"
 
 do_install:append () {
 	mkdir -p ${D}${bindir}/ ${D}${sysconfdir}/init.d