Get the modification time of a config file with a higher precision to fix cases when it's not reloaded after modification/replacement

[ilya071294]

The fix is needed to avoid potential problems in Firebird QA.

[aafemt]

Wouldn't it be better to make Windows version of getTime to return timespec and unify the rest of code?

Also it is simpler to use GetFileAttributesEx than FindFirstFile.

[ilya071294]

Wouldn't it be better to make Windows version of getTime to return timespec and unify the rest of code?

I can do that if conversion to timespec on every checkLoadConfig call is appropriate. @AlexPeshkoff What do you think?

Also it is simpler to use GetFileAttributesEx than FindFirstFile.

Done.

[aafemt]

I can do that if conversion to timespec on every checkLoadConfig call is appropriate.

IIRC this "conversion" is a couple of multiplication.