Make TempCacheLimit setting database-wise [CORE5718]

[firebird-automations]

Submitted by: @dyemanov

First, allow this setting to be customized per-database via databases.conf. Second, even if the global default is used, account the temp cache usage separately for every attached database instead of per server process as now. This matches the page cache setup behaviour.

Commits: eaa0df5

====== Test Details ======

Decided after discuss with dimitr, see letter 22-jan-2018 19:25

[firebird-automations]

Modified by: @dyemanov

assignee: Dmitry Yemanov [ dimitr ]

[firebird-automations]

Modified by: @dyemanov

status: Open [ 1 ] => Resolved [ 5 ]

resolution: Fixed [ 1 ]

Fix Version: 4.0 Beta 1 [ 10750 ]

[firebird-automations]

Modified by: @pavel-zotov

status: Resolved [ 5 ] => Resolved [ 5 ]

QA Status: No test => Cannot be tested

Test Details: Decided after discuss with dimitr, see letter 22-jan-2018 19:25

[firebird-automations]

Modified by: @pavel-zotov

status: Resolved [ 5 ] => Closed [ 6 ]