mio 3b2c79f5ca main/email: fix build with gcc 15 ...

Fix implicit function declaration and bool type errors.

```
checking if strftime is GNU or Non-GNU... /tmp/strftime_try.c: In function 'main':
/tmp/strftime_try.c:16:8: error: implicit declaration of function 'isdigit' [-Wimplicit-function-declaration]
   16 |   if (!isdigit(buf[1]))
      |        ^~~~~~~
/tmp/strftime_try.c:5:1: note: include '<ctype.h>' or provide a declaration of 'isdigit'
    4 | #include <sys/time.h>
  +++ |+#include <ctype.h>
    5 |
ERROR: Could not compile strftime().
```

```
In file included from src/dhash.c:7:
/home/[...]/aports/main/email/src/email-3.1.3/dlib/include/dlib.h:4:16: error: cannot use keyword 'false' as enumeration constant
    4 | typedef enum { false, true } bool;
      |                ^~~~~
/home/[...]/aports/main/email/src/email-3.1.3/dlib/include/dlib.h:4:16: note: 'false' is a keyword with '-std=c23' onwards
```

2025-07-30 05:49:38 +00:00

..

APKBUILD

…

gcc15.patch

…