Add info about database which was in use for messages in firebird.log

[pavel-zotov]

Consider server with dozen of databases. Some of them are under active developing among several programmers. It is difficult to detect name of DB in such cases:

SOME_SERVER Thu Aug 19 21:17:22 2021
        Modifying procedure SOME_PROC_NAME which is currently in use by active user requests

Please add name of current DB for such messages.