DOCS-1205 change hostname in a replica set

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-1205: edits
DOCS-906, DOCS-1334, DOCS-1667: updating and improving monitoring intro

Signed-off-by: Sam Kleinman <samk@10gen.com>
redirect removing redirection
monitoring page edits
release notes change collection name in update statement

Signed-off-by: Sam Kleinman <samk@10gen.com>
minor: fixing white space
DOCS-1820: Max index name length is 125 characters not 128

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-1820 adding comment for future clarity