postgresql*: prepare for OpenSSL 1.1 migration

[yan12125 (Chih-Hsuan Yen)]

This is a preparation step for the OpenSSL 1.1 migration (ticket:52101).

OpenSSL 1.1 support is available since PostgreSQL 9.5 (1) and the patch is backported to 9.4 (2), 9.3 and 9.2 (3). Older ports should be patched or use the openssl10 port.

Note that PostgreSQL 9.3 or older is no longer supported upstream (4), so they may be dropped from MacPorts

(1) ​https://www.postgresql.org/message-id/20180226054445.GE6927%40paquier.xyz

(2) ​https://github.com/postgres/postgres/commit/bb132cddf870885a6e3af102fe2accd04e5da38a

(3) ​https://github.com/postgres/postgres/commit/4e91330daca017aeeed2a3deea646a7c9aaaa45f

(4) ​https://www.postgresql.org/support/versioning/

[yan12125 (Chih-Hsuan Yen)]

In e660ba6a7265d21b28decb8f2b9a0ec4fd6541fe/macports-ports (master):

openssl: update to 1.1.1c

Closes: #52101
Ref: #58218 (old Qt5 versions)
Ref: #58607 (old MySQL versions)
Ref: #58630 (old PostgreSQL versions)

[chrstphrchvz (Christopher Chavez)]

In 383bc5529edd5164a6efc91cba14fa560d76e641/macports-ports (master):

postgresql80: delete port

EOL was 13 years ago.
See: #58630

dspam: disable postgres and mysql5 variants
See: #43431

Remove/disable variants of dependents without deprecating first:
for over 4 years, they have been unusable due to their dependency
failing to build.

[chrstphrchvz (Christopher Chavez)]

In 4ff309152c200ffe5e16bc519e667610e983546e/macports-ports (master):

postgresql81: delete port

EOL was almost 13 years ago.
See: #58630

Remove variants of dependents without deprecating first:
for over 4 years, they have been unusable due to postgresql81
failing to build.

pg2xbase: delete port
Upstream gone since 2008. No dependents.
Not offered by other package managers.
Closes: #38840