pgsql: Hide other user's pg_stat_ssl rows

Hide other user's pg_stat_ssl rows

Change pg_stat_ssl so that an unprivileged user can only see their own
rows; other rows will be all null.  This makes the behavior consistent
with pg_stat_activity, where information about where the connection
came from is also restricted.

Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://www.postgresql.org/message-id/flat/63117976-d02c-c8e2-3aef-caa31a5ab8d3%402ndquadrant.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/f9692a769b16f53be80f819fa5ee91e28dc7683a

Modified Files
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src/backend/utils/adt/pgstatfuncs.c | 73 +++++++++++++++++++++----------------
1 file changed, 41 insertions(+), 32 deletions(-)