net: cleanups in sock_setsockopt()

Use min_t()/max_t() macros, reformat two comments, use !!test_bit() to
match !!sock_flag()

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
void cred_to_ucred(struct pid *pid, const struct cred *cred,
		   struct ucred *ucred)
{
	ucred->pid = pid_vnr(pid);
	ucred->uid = ucred->gid = -1;
	if (cred) {
		struct user_namespace *current_ns = current_user_ns();

		ucred->uid = user_ns_map_uid(current_ns, cred, cred->euid);
		ucred->gid = user_ns_map_gid(current_ns, cred, cred->egid);
	}
}

void cred_to_ucred(struct pid *pid, const struct cred *cred,
		   struct ucred *ucred)
{
	ucred->pid = pid_vnr(pid);
	ucred->uid = ucred->gid = -1;
	if (cred) {
		struct user_namespace *current_ns = current_user_ns();

		ucred->uid = user_ns_map_uid(current_ns, cred, cred->euid);
		ucred->gid = user_ns_map_gid(current_ns, cred, cred->egid);
	}
}
