Document more flags in the tserver page (#139)

Author: hectorgcr

content/latest/admin/yb-tserver.md

@@ -63,8 +63,11 @@ Flag | Mandatory | Default | Description
 `--version` | N | N/A | Show version and build info.
 `--use_cassandra_authentication` | N | false | If enabled, it will require YCQL client authentication (username/password), enable YCQL security statements (CREATE/DROP/GRANT/REVOKE ROLE and GRANT/REVOKE PERMISSION), and enforce permissions for YCQL statements.
 `--rocksdb_compact_flush_rate_limit_bytes_per_sec` | N | 256MB | Used to control rate of memstore flush and SSTable file compaction.
-`--remote_boostrap_rate_limit_bytes_per_sec` | N | 256MB | Rate control across all tablets being remote bootstrapped from or to this process.
+`--remote_bootstrap_rate_limit_bytes_per_sec` | N | 256MB | Rate control across all tablets being remote bootstrapped from or to this process.
 `--yb_num_shards_per_tserver` | N | -1 | The number of shards per yb-tserver per table when a user table is created. Server automatically picks a valid default internally.
+`--durable_wal_write` | N | false | If set to `false`, the writes to the Raft log are synced to disk every `interval_durable_wal_write_ms` milliseconds or every `bytes_durable_wal_write_mb` MB, whichever comes first. This default setting is recommended only for multi-AZ or multi-region deployments where the zones/regions are independent failure domains and there isn't a risk of correlated power loss.
+`--interval_durable_wal_write_ms` | N | 1000 | When `durable_wal_write` is false, writes to the Raft log are synced to disk every `interval_durable_wal_write_ms` milliseconds. Also see `bytes_durable_wal_write_mb`.
+`--bytes_durable_wal_write_mb`` | N | 1 | When `durable_wal_write` is false, writes to the Raft log are synced to disk every `bytes_durable_wal_write_mb` MB. Also see `interval_durable_wal_write_ms`.
 
 ## Admin UI