Patch for http-fetch.c and older curl releases

Hi.

Older curl releases do not define CURLE_HTTP_RETURNED_ERROR, they
use CURLE_HTTP_NOT_FOUND instead. The trivial patch below fixes
the build error. Newer curl releases keep the CURLE_HTTP_NOT_FOUND
definition but using a -DCURL_NO_OLDIES preprocessor flag
the old name will not be present in the 'curl.h' header. The
comments in 'curl.h' have more info about the name change.

Signed-off-by:  Art Haas <redacted>

diff --git a/http-fetch.c b/http-fetch.c
index bc74f30..76fcdc7 100644
--- a/http-fetch.c
+++ b/http-fetch.c

@@ -149,7 +149,7 @@ static int missing__target(int code, int
 	return	/* file:// URL -- do we ever use one??? */
 		(result == CURLE_FILE_COULDNT_READ_FILE) ||
 		/* http:// and https:// URL */
-		(code == 404 && result == CURLE_HTTP_RETURNED_ERROR) ||
+		(code == 404 && result == CURLE_HTTP_NOT_FOUND) ||
 		/* ftp:// URL */
 		(code == 550 && result == CURLE_FTP_COULDNT_RETR_FILE)
 		;

-- 
Man once surrendering his reason, has no remaining guard against absurdities
the most monstrous, and like a ship without rudder, is the sport of every wind.

-Thomas Jefferson to James Smith, 1822