psql: Remove PARTITION BY clause in tab completion for unlogged tables

Remove support for unlogged on partitioned tables

Remove ATT_TABLE for ALTER TABLE ... ATTACH/DETACH

Introduce ATT_PARTITIONED_TABLE in tablecmds.c

Refactor some code for ALTER TABLE SET LOGGED/UNLOGGED in tablecmds.c

Add new error code for "file name too long"

Assign error codes where missing for user-facing failures

Remove option to fall back from direct to postgres SSL negotiation

Reject SSL connection if ALPN is used but there's no common protocol

libpq: Enforce ALPN in direct SSL connections

libpq: If ALPN is not used, make PQsslAttribute(conn, "alpn") == ""

Fix documentation and comments on what happens after GSS rejection