Make Couchbase-cli -h consistent

Hi Anil,

I found several typos and a few confusing explanations for couchbase-cli command options. Here are my suggested updates which will also make --help consistent with the docs. Please review and assign to engineering to update. Be also aware that compaction is misspelled as a command: "setting-compacttion"

server-add OPTIONS:
--server-add=HOST[:PORT] Server to add to cluster
--server-add-username=USERNAME Admin username for the server to be added
--server-add-password=PASSWORD Admin password for the server to be added

server-readd OPTIONS:
--server-add=HOST[:PORT] Server to add to cluster
--server-add-username=USERNAME Admin username for the server to be added
--server-add-password=PASSWORD Admin password for the server to be added

rebalance OPTIONS:
--server-add* See server-add OPTIONS
--server-remove=HOST[:PORT] The server to remove from cluster

failover OPTIONS:
--server-failover=HOST[:PORT] Server to failover

cluster-* OPTIONS:
--cluster-username=USER New admin username
--cluster-password=PASSWORD New admin password
--cluster-port=PORT New cluster REST/http port
--cluster-ramsize=RAMSIZEMB Per node RAM quota in MB

node-init OPTIONS:
--node-init-data-path=PATH Per node path to store data
--node-init-index-path=PATH Per node path to store index

bucket-* OPTIONS:
--bucket=BUCKETNAME Named bucket to act on
--bucket-type=TYPE Bucket type, either memcached or couchbase
--bucket-port=PORT Supports ASCII protocol and does not require authentication
--bucket-password=PASSWORD Standard port, exclusive with bucket-port
--bucket-ramsize=RAMSIZEMB Bucket RAM quota in MB
--bucket-replica=COUNT Replication count
--enable-flush=[0|1] Enable/disable flush
--enable-index-replica=[0|1] Enable/disable index replicas
--wait Wait for bucket create to be complete before returning
--force Force command execution without asking for confirmation
--data-only Compact database data only
--view-only Compact view data only

setting-compacttion OPTIONS:
--compaction-db-percentage=PERCENTAGE Percentage of disk fragmentation when database compaction is triggered
--compaction-db-size=SIZE[MB] Size of disk fragmentation when database compaction is triggered
--compaction-view-percentage=PERCENTAGE Percentage of disk fragmentation when views compaction is triggered
--compaction-view-size=SIZE[MB] Size of disk fragmentation when views compaction is triggered
--compaction-period-from=HH:MM Enable compaction from this time onwards
--compaction-period-to=HH:MM Stop enabling compaction at this time
--enable-compaction-abort=[0|1] Allow compaction to abort when time expires
--enable-compaction-parallel=[0|1] Allow parallel compaction processes for database and view

setting-compacttion OPTIONS:
--compaction-db-percentage=PERCENTAGE Percentage of disk fragmentation when database compaction is triggered
--compaction-db-size=SIZE[MB] Size of disk fragmentation when database compaction is triggered
--compaction-view-percentage=PERCENTAGE Percentage of disk fragmentation when views compaction is triggered
--compaction-view-size=SIZE[MB] Size of disk fragmentation when views compaction is triggered
--compaction-period-from=HH:MM Enable compaction from this time onwards
--compaction-period-to=HH:MM Stop enabling compaction at this time
--enable-compaction-abort=[0|1] Allow compaction to abort when time expires
--enable-compaction-parallel=[0|1] Allow parallel compaction processes for database and view

setting-notification OPTIONS:
--enable-notification=[0|1] Allow notifications

setting-alert OPTIONS:
--enable-email-alert=[0|1] Allow email alert
--email-recipients=RECIPIENT Email recipents, separate addresses with , or ;
--email-sender=SENDER Sender email address
--email-user=USER Email server username
--email-password=PWD Email server password
--email-host=HOST Email server hostname
--email-port=PORT Email server port
--enable-email-encrypt=[0|1] Email encryption with 0 the default for no encryption
--alert-auto-failover-node Node was failed over via autofailover
--alert-auto-failover-max-reached Maximum number of auto failover nodes reached
--alert-auto-failover-node-down Node not auto failed-over as other nodes are down at the same time
--alert-auto-failover-cluster-small Node not auto failed-over as cluster was too small
--alert-ip-changed Node ip address changed unexpectedly
--alert-disk-space Disk space used for persistent storage has reached at least 90% capacity
--alert-meta-overhead Metadata overhead is more than 50% of RAM for node
--alert-meta-oom Bucket memory on a node is entirely used for metadata
--alert-write-failed Writing data to disk for a specific bucket has failed

setting-autofailover OPTIONS:
--enable-auto-failover=[0|1] Allow auto failover
--auto-failover-timeout=TIMEOUT (>=30) Specify amount of node timeout that triggers auto failover

setting-xdcr OPTIONS:
--max-concurrent-reps=[32] Maximum concurrent replicators per bucket, 8 to 256.
--checkpoint-interval=[1800] Intervals between checkpoints, 60 to 14400 seconds.
--worker-batch-size=[500] Doc batch size, 500 to 10000.
--doc-batch-size=[2048]KB Document batching size, 10 to 100000 KB
--failure-restart-interval=[30] Interval for restarting failed xdcr, 1 to 300 seconds
--optimistic-replication-threshold=[256] Document body size threshold (bytes) to trigger optimistic replication

xdcr-setup OPTIONS:
--create Create a new xdcr configuration
--edit Modify existed xdcr configuration
--delete Delete existing xdcr configuration
--xdcr-cluster-name=CLUSTERNAME Remote cluster name
--xdcr-hostname=HOSTNAME Remote host name to connect to
--xdcr-username=USERNAME Remote cluster admin username
--xdcr-password=PASSWORD Remote cluster admin password

xdcr-replicate OPTIONS:
--create Create and start a new replication
--delete Stop and cancel a replication
--xdcr-from-bucket=BUCKET Source bucket name to replicate from
--xdcr-clucter-name=CLUSTERNAME Remote cluster to replicate to
--xdcr-to-bucket=BUCKETNAME Remote bucket to replicate to