gdbm: Update to version 1.24

gdbm: Update to version 1.24

- Update from version 1.23 to 1.24
- Update of rootfile not required
- Changelog
    1.24
	* New gdbm_load option: --update
		The --update (-U) option instructs gdbm_load to update an existing
		 database.
	* Fix semantics of gdbm_load -r
		The --replace (-r) is valid only when used together with --update.
	* Use getline in gdbmtool shell.
	* New function: gdbm_load_from_file_ext
		In contrast to gdbm_load and gdbm_load_from_file, which derive
		the value of the flag parameter for gdbm_open from the value
		of their "replace" argument, this function allows the caller to
		specify it explicitly.  The prototype is:
		  int gdbm_load_from_file_ext (GDBM_FILE *pdbf, FILE *fp,
					       int flags, int replace,
					       int meta_mask,
					       unsigned long *line);
	* Bugfixes
		** Fix binary dump format for key and/or data of zero size.
		   (see https://puszcza.gnu.org.ua/bugs/?565)
		** Fix location tracking and recover command in gdbtool.
		   (see https://puszcza.gnu.org.ua/bugs/?566)
		** Fix possible buffer underflow in gdbmload.
		** Ensure any padding bytes in avail_elem structure are filled with 0.
		   (fixes https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1031276)
		** Improve the documentation.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>