Test 161 updated accordingly

In commit c834213a we re-used some obsolete error codes, and here are
two defines that makes sure existing source codes that happen to use any
of these deprecated ones will still compile.

As usual, define CURL_NO_OLDIES to avoid getting these "precaution
defines".

Previously the code would create a dummy socket while resolving just to
have curl_multi_fdset() return something but the non-win32 version
doesn't do it this way and the creation and use of a socket that isn't
made with the common create-socket callback can be confusing to apps
using the multi_socket API etc.

This change removes the dummy socket and thus will cause
curl_multi_fdset() to return with maxfd == -1 more often.

With this change, curl compiles with the new OPENSSL_NO_SSL_INTERN
cflag. This flag might become the default in some distant future.

make 'pidfile' and 'logfile' options appear first on command line in order
to ensure that processing of other options which write to logfile do this
to intended file and not the default one.

Fixed a problem in POP3 and IMAP where a connection would fail when
CURLUSESSL_TRY was specified for a server that didn't support
SSL/TLS connections rather than continuing.

The STARTTLS response code in SMTP, POP3 and IMAP would return
CURLE_LOGIN_DENIED rather than CURLE_USE_SSL_FAILED when SSL/TLS
was not available on the server.

Reported by: Gokhan Sengun
Bug: http://curl.haxx.se/mail/lib-2012-01/0018.html

Two bugfixes, two more contributors

There's a new 'http-proxy' server for tests that runs on a separate port
and lets clients do HTTP CONNECT to other ports on the same host to
allow us to test HTTP "tunneling" properly.

Test cases now have a <proxy> section in <verify> to check that the
proxy protocol part matches correctly.

Test case 80, 83, 95, 275, 503 and 1078 have been converted. Test 1316
was added.

Unfortunately we have no test cases for this and I have no SSPI build or
server to verify this with. The change seems simple enough though.

Bug: http://curl.haxx.se/bug/view.cgi?id=3466497
Reported by: Patrice Guerin

When the buffer gets realloced to hold the file name in the
SSH_SFTP_READDIR_LINK state, the counter was not bumped accordingly.

Reported by: Armel Asselin
Patch by: Armel Asselin
Bug: http://curl.haxx.se/mail/lib-2011-12/0249.html

6 more bugfixes, 3 more contributors

... to make sure the DNS cache is properly case insensitive

When a HTTP connection is re-used for a subsequent request without
proxy, it would always re-use the Host: header of the first request. As
host names are case insensitive it would make curl send another host
name case that what the particular request used.

Now it will instead always use the most recent host name to always use
the desired casing.

Added test case 1318 to verify.

Bug: http://curl.haxx.se/mail/lib-2011-12/0314.html
Reported by: Alex Vinnik

The load host names to DNS cache function was moved to hostip.c and it
now makes sure to not add host names that already are present in the
cache. It would previously lead to memory leaks when for example using
the --resolve and multiple URLs on the command line.

These examples show how to fetch a single message (RETR command) and how to
list all the messages in a given mailbox (LIST command), with authentication
via SSL.

They were both based on the https.c example.

Take in account that 'pingpong' server commands may arrive splitted among
several sockfilt 'DATA' PDU's.

Initial step in order to allow our pingpong server to better support arbitrary
application data splitting among TCP packets. This first commit only addresses
reasembly of data that sockfilter processes reads from soockets and pingpong
server later reads from sockfilters stdout.