ipa-otpd: fix gcc complaints in Rawhide

In file included from /usr/include/string.h:519,
                 from /usr/include/lber.h:30,
                 from /usr/include/ldap.h:30,
                 from internal.h:27,
                 from main.c:31:
In function 'strncpy',
    inlined from 'main' at main.c:237:5:
/usr/include/bits/string_fortified.h:91:10: warning: 'strncpy' specified bound 255 equals destination size [-Wstringop-truncation]
   91 |   return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Fixes: https://pagure.io/freeipa/issue/8585
Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>

daemons/ipa-otpd/main.c

@@ -214,7 +214,7 @@ static krb5_error_code setup_ldap(const char *uri, krb5_boolean bind,
 int main(int argc, char **argv)
 {
     const char *hostname;
-    char fqdn[IPA_HOST_FQDN_LEN];
+    char fqdn[IPA_HOST_FQDN_LEN + 1];
     krb5_error_code retval;
     krb5_data hndata;
     verto_ev *sig;