Remove pgbench's hardwired limit on line length in custom script files.
Remove pgbench's hardwired limit on line length in custom script files.

pgbench formerly failed on lines longer than BUFSIZ, unexpectedly
splitting them into multiple commands.  Allow it to work with any
length of input line.

Sawada Masahiko

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