Fix reporting of missing or invalid command line arguments in pg_rewind.
Fix reporting of missing or invalid command line arguments in pg_rewind.

pg_fatal never returns, so a multi-line message cannot be printed by
calling it twice.

Michael Paquier and Fujii Masao

xinzweb/gpdb,lisakowen/gpdb,50wu/gpdb,xinzweb/gpdb,50wu/gpdb,pavanvd/postgres-xl,adam8157/gpdb,yazun/postgres-xl,pavanvd/postgres-xl,ovr/postgres-xl,lisakowen/gpdb,lisakowen/gpdb,xinzweb/gpdb,xinzweb/gpdb,pavanvd/postgres-xl,50wu/gpdb,lisakowen/gpdb,oberstet/postgres-xl,greenplum-db/gpdb,ashwinstar/gpdb,50wu/gpdb,adam8157/gpdb,xinzweb/gpdb,greenplum-db/gpdb,jmcatamney/gpdb,techdragon/Postgres-XL,adam8157/gpdb,adam8157/gpdb,ovr/postgres-xl,ashwinstar/gpdb,greenplum-db/gpdb,techdragon/Postgres-XL,jmcatamney/gpdb,greenplum-db/gpdb,oberstet/postgres-xl,zeroae/postgres-xl,zeroae/postgres-xl,Postgres-XL/Postgres-XL,50wu/gpdb,Postgres-XL/Postgres-XL,ovr/postgres-xl,yazun/postgres-xl,Postgres-XL/Postgres-XL,jmcatamney/gpdb,yazun/postgres-xl,ovr/postgres-xl,oberstet/postgres-xl,yazun/postgres-xl,ashwinstar/gpdb,techdragon/Postgres-XL,ovr/postgres-xl,greenplum-db/gpdb,Postgres-XL/Postgres-XL,zeroae/postgres-xl,oberstet/postgres-xl,ashwinstar/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,50wu/gpdb,techdragon/Postgres-XL,adam8157/gpdb,oberstet/postgres-xl,greenplum-db/gpdb,lisakowen/gpdb,lisakowen/gpdb,techdragon/Postgres-XL,yazun/postgres-xl,greenplum-db/gpdb,adam8157/gpdb,Postgres-XL/Postgres-XL,pavanvd/postgres-xl,pavanvd/postgres-xl,50wu/gpdb,jmcatamney/gpdb,xinzweb/gpdb,jmcatamney/gpdb,adam8157/gpdb,zeroae/postgres-xl,jmcatamney/gpdb,jmcatamney/gpdb,lisakowen/gpdb,xinzweb/gpdb,50wu/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,xinzweb/gpdb,adam8157/gpdb,zeroae/postgres-xl,ashwinstar/gpdb,lisakowen/gpdb