(legacy) add x509_extensions selection to cert_created, related to https://github.com/opnsense/core/issues/81

(cherry picked from commit 9d6473f5)

(legacy) remoev duplicate cert code from usermanager (use redirect instead), closes https://github.com/opnsense/core/issues/59

(cherry picked from commit a8d218d1)

(cherry picked from commit 44a02f94)

(cherry picked from commit 45a82edb)

(cherry picked from commit 9b432e83)

(cherry picked from commit 1f459153)

(cherry picked from commit 0987f259)

(cherry picked from commit 94e5cd9f)

(cherry picked from commit 44d79821)

(cherry picked from commit c0e5cf12)

(cherry picked from commit cd09541e)

(cherry picked from commit 94621944)

(cherry picked from commit ab3beeb0)

(cherry picked from commit 9d5f6c68)

(cherry picked from commit c2f56d53)

(cherry picked from commit 4dfbe310)

(cherry picked from commit 9fa9d28d)

(cherry picked from commit 45910891)

(cherry picked from commit 6f72aedb)

(cherry picked from commit e6af8121)

(cherry picked from commit 44a6e81e)

(cherry picked from commit 95ed1a45)

Signed-off-by: Isaac (.ike) Levy <ike@blackskyresearch.net>
(cherry picked from commit 5489e8ec)

(cherry picked from commit 3cb09b78)

(cherry picked from commit f2e68b90)

(cherry picked from commit d4077fac)

(cherry picked from commit a4335147)

(cherry picked from commit 90ee04ce)

(cherry picked from commit 1f182df6)

Dormant ever since 2009, time to remove those finally.

(cherry picked from commit da8a2bed)

This module was used in the old XMLRPC client code, but is no longer
needed.  Removal was escalated by FreeBSD when the oniguruma4 dependency
of the php56-mbstring module was marked BROKEN.

(cherry picked from commit 3da643e0)

(cherry picked from commit 8ce3d29d)

(cherry picked from commit 891d5f2b)

(cherry picked from commit 32beb6e9)

(cherry picked from commit 86d50f87)

(cherry picked from commit 0044fd35)