doc: Update RFC URLs

Michael Paquier <michael@paquier.xyz>

Commit: ebd3c790122aafee0fbc3d0a4db95dc8c5f53730
Author: Michael Paquier <michael@paquier.xyz>
Date: 2019-01-05T03:49:51Z
Releases: 9.5.16
doc: Update RFC URLs

Consistently use the IETF HTML links instead of a random mix of
different sites and formats.  This also fixes one broken link for JSON
documentation.

Files

PathChange+/−
doc/src/sgml/json.sgml modified +1 −1
doc/src/sgml/libpq.sgml modified +1 −1
doc/src/sgml/pgcrypto.sgml modified +3 −3