Improve documentation of pg_restore's -l and -L switches to point out their interactions with filtering switches, such as -n and -t.  Per a complaint from Russell Smith.
Improve documentation of pg_restore's -l and -L switches to point out their
interactions with filtering switches, such as -n and -t.  Per a complaint
from Russell Smith.

xinzweb/gpdb,oberstet/postgres-xl,ovr/postgres-xl,greenplum-db/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,techdragon/Postgres-XL,Postgres-XL/Postgres-XL,greenplum-db/gpdb,zeroae/postgres-xl,arcivanov/postgres-xl,jmcatamney/gpdb,lisakowen/gpdb,tpostgres-projects/tPostgres,techdragon/Postgres-XL,adam8157/gpdb,xinzweb/gpdb,Postgres-XL/Postgres-XL,Postgres-XL/Postgres-XL,postmind-net/postgres-xl,arcivanov/postgres-xl,kmjungersen/PostgresXL,lisakowen/gpdb,zeroae/postgres-xl,adam8157/gpdb,pavanvd/postgres-xl,jmcatamney/gpdb,ashwinstar/gpdb,50wu/gpdb,greenplum-db/gpdb,yazun/postgres-xl,snaga/postgres-xl,arcivanov/postgres-xl,jmcatamney/gpdb,ovr/postgres-xl,greenplum-db/gpdb,greenplum-db/gpdb,50wu/gpdb,arcivanov/postgres-xl,xinzweb/gpdb,postmind-net/postgres-xl,ashwinstar/gpdb,lisakowen/gpdb,pavanvd/postgres-xl,ashwinstar/gpdb,50wu/gpdb,zeroae/postgres-xl,lisakowen/gpdb,yazun/postgres-xl,ashwinstar/gpdb,yazun/postgres-xl,xinzweb/gpdb,50wu/gpdb,jmcatamney/gpdb,lisakowen/gpdb,zeroae/postgres-xl,arcivanov/postgres-xl,50wu/gpdb,postmind-net/postgres-xl,Postgres-XL/Postgres-XL,kmjungersen/PostgresXL,postmind-net/postgres-xl,ashwinstar/gpdb,adam8157/gpdb,pavanvd/postgres-xl,lisakowen/gpdb,techdragon/Postgres-XL,adam8157/gpdb,ovr/postgres-xl,lisakowen/gpdb,adam8157/gpdb,lisakowen/gpdb,50wu/gpdb,kmjungersen/PostgresXL,ovr/postgres-xl,jmcatamney/gpdb,snaga/postgres-xl,adam8157/gpdb,yazun/postgres-xl,tpostgres-projects/tPostgres,xinzweb/gpdb,ashwinstar/gpdb,yazun/postgres-xl,xinzweb/gpdb,tpostgres-projects/tPostgres,greenplum-db/gpdb,xinzweb/gpdb,arcivanov/postgres-xl,ovr/postgres-xl,adam8157/gpdb,tpostgres-projects/tPostgres,xinzweb/gpdb,kmjungersen/PostgresXL,pavanvd/postgres-xl,snaga/postgres-xl,jmcatamney/gpdb,ashwinstar/gpdb,oberstet/postgres-xl,jmcatamney/gpdb,snaga/postgres-xl,adam8157/gpdb,techdragon/Postgres-XL,oberstet/postgres-xl,tpostgres-projects/tPostgres,snaga/postgres-xl,jmcatamney/gpdb,techdragon/Postgres-XL,50wu/gpdb,kmjungersen/PostgresXL,Postgres-XL/Postgres-XL,postmind-net/postgres-xl,pavanvd/postgres-xl,oberstet/postgres-xl,zeroae/postgres-xl,oberstet/postgres-xl,50wu/gpdb