good strlcat

size_t      ft_strlcat(char *dst, const char *src, size_t size)
{
    size_t      strlendst;
    size_t      strlensrc;
    size_t      run;

    strlendst = ft_strlen(dst);
    strlensrc = ft_strlen(src);
    if (size == 0)
        return (strlensrc);
    if (size - 1 < strlendst)
        return (strlensrc + size);
    run = 0;
    while ((strlendst + run < size - 1) && src[run])
    {
        dst[strlendst + run] = src[run];
        run++;
    }
    dst[strlendst + run] = '\0';
    return (strlendst + strlensrc);
}