Nis Jorgensen filed bug report #1338648

(http://curl.haxx.se/bug/view.cgi?id=1338648) which really is more of a
feature request, but anyway. It pointed out that --max-redirs did not allow
it to be set to 0, which then would return an error code on the first
Location: found. Based on Nis' patch, now libcurl supports CURLOPT_MAXREDIRS
set to 0, or -1 for infinity. Added test case 274 to verify.

tests/data/test274

@@ -0,0 +1,50 @@
+<info>
+<keywords>
+HTTP
+HTTP GET
+followlocation
+--max-redirs
+</keywords>
+</info>
+# Server-side
+<reply>
+<data>
+HTTP/1.1 301 This is a weirdo text message swsclose
+Server: test-server/fake
+Location: data/reply/25
+Content-Length: 0
+Connection: close
+
+</data>
+</reply>
+
+# Client-side
+<client>
+<server>
+http
+</server>
+ <name>
+HTTP Location: following with --max-redirs 0
+ </name>
+ <command>
+http://%HOSTIP:%HTTPPORT/want/274 -L --max-redirs 0
+</command>
+</client>
+
+# Verify data after the test has been "shot"
+<verify>
+<strip>
+^User-Agent: curl/.*
+</strip>
+<protocol>
+GET /want/274 HTTP/1.1
+User-Agent: curl/7.8.1-pre3 (sparc-sun-solaris2.7) libcurl 7.8.1-pre3 (OpenSSL 0.9.6a) (krb4 enabled)
+Host: 127.0.0.1:%HTTPPORT
+Accept: */*
+
+</protocol>
+
+<errorcode>
+47
+</errorcode>
+</verify>