time.h definition missing in dpi/zip.c and dpi/fileutil.c

[pkotrcka]

Missing time.h definition in dpi/zip.c and dpi/fileutil.c

And also:

#define __USE_XOPEN

#define _GNU_SOURCE

in dpi/zip.c

---

resulting in:

zip.c: In function ‘Zip_dillodir_fs_new’:
zip.c:307:13: error: implicit declaration of function ‘strptime’; did you mean ‘strftime’? [-Wimplicit-function-declaration]
307 | strptime(timestamp, "%m-%d-%Y %H:%M", &tm);
| ^~~~~~~~
| strftime

using commit: 28ecf13