psql: Add documentation URL to \help output
Add a link to the specific command's reference web page to the bottom
of its \help output.
Discussion: https://www.postgresql.org/message-id/flat/40179bd0-fa7d-4108-1991-a20ae9ad5667%402ndquadrant.com
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/27f3dea64833d68c1fa08c1e5d26176a579f69c8
Modified Files
--------------
src/bin/psql/create_help.pl | 10 ++++++++--
src/bin/psql/help.c | 11 +++++++++--
2 files changed, 17 insertions(+), 4 deletions(-)