fix x86_64-linux-gnu-gcc compile error

```
util.c: In function ‘parse_uri’:
util.c:389:17: error: ‘PATH_MAX’ undeclared (first use in this function); did you mean ‘AF_MAX’?
  389 |  char host_name[PATH_MAX];
      |                 ^~~~~~~~
      |                 AF_MAX
util.c:389:17: note: each undeclared identifier is reported only once for each function it appears in
```

src/util.c

@@ -28,6 +28,7 @@
 #include <fcntl.h>
 #include <inttypes.h>
 #include <linux/capability.h>
+#include <linux/limits.h>
 #include <linux/netlink.h>
 #include <netinet/tcp.h>
 #include <openssl/crypto.h>
@@ -1058,4 +1059,4 @@ void print_stack(void)
 		void *offset = (void *)((char *)(addr) - (char *)(info.dli_fbase));
 		tlog(TLOG_FATAL, "#%.2d: %p %s from %s+%p", idx + 1, addr, symbol, info.dli_fname, offset);
 	}
-}
+}