Firebird 2.5.4 uploaded to Debian Unstable

firebird2.5 (2.5.4.26856.ds4-1) package is uploaded with the following changes:

* move firebird.msg from firebird2.5-common to libfbclient2, under /usr/lib
Closes: #782842 — firebird2.5-common: firebird.msg is
architecture-specific
* Imported Upstream version 2.5.4.26856.ds4
+ update copyright information (added a file and a directory)
+ drop upstream/r58859-arm64.patch (released upstream)
+ drop out/fb_guard-lock-permissions.patch (applied upstream)
+ drop upstream/r60322-remote-crash.patch (released upstream)
+ drop upstream/r60322-remote-crash.patch (released upstream)
+ refresh five patches to apply cleanly
* link fbguard with dl, it uses at least dl_close