[HIGH] STR #4045: ipp backend returns "printer is not responding" when connecting via SSL to cups on Red Hat Linux

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[STR New]

On Mac OS X 10.7 and Mac OS X 10.8, I am unable to print to an address of
https://printers.example.com:631/printers/printername where 
printers.example.com is running CUPS 1.3.7 on Red Hat Linux and requires
SSL + Basic Authentication.  The error message in Mac OS X is "printer is
not responding."  

I traced this down to line 4165 in http.c.  It knows about the case where
the non-fatal error "errSSLWouldBlock" occurs but doesn't handle it right.
 I added:

error = noErr;
done = 1;

before the break; and was able to print.  See the attached file.

Link: http://www.cups.org/str.php?L4045
Version: 1.5.2
Attachment: http://www.cups.org/strfiles/4045/http.c