RFR: 8349083: Factor out filename handling code from logging

[Zhengyu Gu]

On Thu, 13 Feb 2025 05:42:33 GMT, David Holmes <dholmes at openjdk.org> wrote:

> The hope was we would have a range of time specifiers for different notion of timestamp - but given different uses of %t already exist that would be problematic.

I hear you! I certainly would like to see the consistency and would like to vote for using `current` time for `%t`, because it really simplifies the file retention policy.

I think this refactoring can provide a center place to enforce whatever the standard we will agree on :-)

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PR Comment: https://git.openjdk.org/jdk/pull/23410#issuecomment-2656741405