metadata purge interval : default value is 3 or 7 days depending on where you look inside the documentation

On this doc page :

https://docs.couchbase.com/server/current/manage/manage-settings/configure-compact-settings.html#tombstone-purge-interval

purge metadata interval default value is 3 days. Thats is clearly the (good) default value we can se in Couchbase.

On all other doc pages https://docs.couchbase.com/server/6.5/cli/cbcli/couchbase-cli-setting-compaction.html (5.x, 6.x and 7.x) it is said:

By default the purge interval is set to 7 days. This means that we purge deletes from disk that are more than 7 days old. The value of this option must be between 0.04 (1 hour) and 60 (days).

That is wrong and should be fixed (3 days is the good value).