56: IBM i CL wrapper `parse_command_line()` never enters quote mode

In `projects/OS400/curlcl.c`, the `parse_command_line()` function initializes `quote` to `'\0'` but no code path ever assigns an opening `'` or `"` to it. The close-quote check (line 82), quote-aware backslash handling (line 88), and unterminated-quote error (line 106) are all dead code. As a …

char quote = '\0';          // line 60 — initialized to NUL
...
if(quote && quote == c) {   // line 82 — close-quote: unreachable because quote is always NUL
  quote = '\0';
  continue;
}