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.

Make testcurl.pl ignore messages pertaining to third party m4 files we don't
care nor use on a file basis policy while retaining all other warnings.

This closes temporary commit e71e226f

The commit 9dd85bce unintentionally changed the way we compute the time
spent waiting for 100-continue.  In particular, when using a SSL client
certificate, the time spent by SSL handshake was included and could
cause the CURL_TIMEOUT_EXPECT_100 timeout to be mistakenly fired up.

Bug: https://bugzilla.redhat.com/767490
Reported by: Mamoru Tasaka

ftp_do_more() returns after accepting the server connect however it
needs to fall through and set "*complete" to TRUE before exit from the
function.

Bug: http://curl.haxx.se/mail/lib-2011-12/0250.html
Reported by: Gokhan Sengun

In the recent do_more fix the new logic was mistakenly checking the
pointer instead of what it points to.

Reported by: Gokhan Sengun
Bug: http://curl.haxx.se/mail/lib-2011-12/0250.html

When sending quote command to a SFTP server and 'mkdir' was used, it
would send fixed permissions and not use the CURLOPT_NEW_DIRECTORY_PERMS
as it should.

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

The INTERNALS document suggested that compatibility should be
maintained with perl version 4, but this was untrue - scripts such as
chksource.pl and runtests.pl use perl5-isms.

CURLOPT_RESOLVE populates the DNS cache with entries that are marked as
eternally in use. Those entries need to be taken care of when the cache
is killed off.

Bug: http://curl.haxx.se/bug/view.cgi?id=3463121
Reported by: "tw84452852"

Test 1317 verifies --resolve (leaked memory)

Bug: http://curl.haxx.se/bug/view.cgi?id=3463121
Reported by: "tw84452852"

Allow autobuilds to run a couple of days without filtering out aclocal
underquoted definition warnings.

This function was introduced in commit 5527417a and as pointed out
by Gokhan Sengun, the array with poll structs must large enough to hold
3 sockets since that is what the function can accept. It could be noted
that he had this fixed in his patch as posted in
http://curl.haxx.se/mail/lib-2011-12/0179.html

Bug: http://curl.haxx.se/mail/lib-2011-12/0228.html
Reported by: Gokhan Sengun

5 new bugfixes, 2 new changes and 4 new contributors

It is no longer done blocking in the multi interface

First off the timeout for accepting a server connect back must of course
respect a global timeout. Then the timeleft function is only used by ftp
code so it was moved to ftp.c and made static.

It did a long time ago

"wait_data_conn" was added to the connectionbits in commit c834213a for
handling active FTP connections but as it is purely FTP specific and now
only ever accessed by ftp.c I moved it into the FTP connection struct.

Backpedaled out the funny double-change of state in the multi state
machine by adding a new argument to the do_more() function to signal
completion. This way it can remain in the DO_MORE state properly until
done. Long term, the entire DO_MORE logic should be moved into the FTP
code and be hidden from the multi code as the logic is only used for
FTP.

1- Two new error codes are introduced.

CURLE_FTP_ACCEPT_FAILED to be set whenever ACCEPTing fails because of
FTP server connected.

CURLE_FTP_ACCEPT_TIMEOUT to be set whenever ACCEPTing timeouts.

Neither of these errors are considered fatal and control connection
remains OK because it could just be a firewall blocking server to
connect to the client.

2- One new setopt option was introduced.

CURLOPT_ACCEPTTIMEOUT_MS

It sets the maximum amount of time FTP client is going to wait for a
server to connect. Internal default accept timeout is 60 seconds.

This offers an alternative to the existing Curl_socket_ready() API which
only checks one socket for read and one for write.

When working with the Android Standalone Toolchain the compiler defines
this macro:

  /path/to/arm-linux-androideabi-gcc -E -dM - < /dev/null \
  | grep -i android
  #define __ANDROID__ 1

We really need to check both ANDROID and __ANDROID__ since I've observed
that:

* if you use Android.mk file(s) and the 'ndk-build' script (aka vanilla
way), ANDROID is predefined (see -DANDROID extra C flag),

* if you use the Android Standalone Toolchain, then __ANDROID__ is
predefined as stated by the compiler

As commit ce896875 fixed a timer that accidentally had been moved in
code and then returned a bad timer, the lib500.c code (used in test 500
and some others) now verifies 5 timers against each other to verify that
they have the correct relative values. We cannot compare against
absolute values as the timings will vary a lot.

It makes it easier to introduce debug outputs in this function, and
everything in the function is using the value anyway so it might even be
more efficient.