Closes #5087

Follow up to ee638377 and 8c7c4a62
Fixes #5077

bumped to 7.69.2

This allows these test files to pass xmllint.

In bmake, if the directory is changed (with cd or anything else), bmake
won't return to the "root directory" on the next command (in the same
Makefile rule). This commit runs the cd command in a subshell so it
would work in bmake.

Closes #5073

As all the -I uses in CFLAGS at that point are for system headers and
third party libraries this helps us remove/ignore warnings on those!

Closes #5060

If --enable-werror is used.

Follow-up to d5c03510 which added it too early in the configure
script before $compiler_num was set correctly and thus this option was
never used.

Reported-by: Stepan Efremov
Fixes #5067
Closes #5068

The CURL_CHECK_COMPILER_GNU_C function sets the number to MAJOR*100 +
MINOR and ignores the patch version, and since gcc version 7 it only
sets it to MAJOR*100.

Reported-by: Stepan Efremov
Ref: #5067
Closes #5069

Fixes #5070
Closes #5072

Follow up to 94ced8e3

Closes #5065

Follow up to 9819984f and 3dce9849
Reviewed-By: Daniel Stenberg
Closes #5064

This fix adds a defensive check for the case where the char *name in
struct libssh2_knownhost is NULL

Fixes #5041
Closes #5062

1. The socks4 state machine was broken in the host resolving phase

2. The code now insists on IPv4-only when using SOCKS4 as the protocol
only supports that.

Regression from #4907 and 4a4b63da, shipped in 7.69.0

Reported-by: amishmm on github
Bug: https://github.com/curl/curl/issues/5053#issuecomment-596191594
Closes #5061

Recent gcc warns when byte count of strncpy() equals the destination
buffer size. Since the destination buffer is previously cleared and
the source string is always shorter, reducing the byte count by one
silents the warning without affecting the result.

Closes #5059

This silents a compilation warning with gcc -O3.

When using maximum code optimization level (-O3), valgrind wrongly
detects uses of uninitialized values in strcmp().

Preset buffers with all zeroes to avoid that.

Closed #5030

This test does A LOT of *wakeup() calls and then calls curl_multi_poll()
twice. The first *poll() is then expected to return early and the second
not - as the first is supposed to drain the socketpair pipe.

It turns out however that when given "excessive" amounts of writes to
the pipe, some operating systems (the Solaris based are known) will
return EAGAIN before the pipe is drained, which in our test case causes
the second *poll() call to also abort early.

This change attempts to avoid the OS-specific behaviors in the test by
reducing the amount of wakeup calls from 1234567 to 10.

Reported-by: Andy Fiddaman
Fixes #5037
Closes #5058

New test 666 checks this is effective.
As upload buffer size is significant in this kind of tests, shorten it
in similar test 652.

Fixes #4860
Closes #4833
Reported-by: RuurdBeerstra on github

Input buffer filling may delay the data sending if data reads are slow.
To overcome this problem, file and callback data reads do not accumulate
in buffer anymore. All other data (memory data and mime framing) are
considered as fast and still concatenated in buffer.
As this may highly impact performance in terms of data overhead, an early
end of part data check is added to spare a read call.
When encoding a part's data, an encoder may require more bytes than made
available by a single read. In this case, the above rule does not apply
and reads are performed until the encoder is able to deliver some data.

Tests 643, 644, 645, 650 and 654 have been adapted to the output data
changes, with test data size reduced to avoid the boredom of long lists of
1-byte chunks in verification data.
New test 667 checks mimepost using single-byte read callback with encoder.
New test 668 checks the end of part data early detection.

Fixes #4826
Reported-by: MrdUkk on github

In case a read callback returns a status (pause, abort, eof,
error) instead of a byte count, drain the bytes read so far but
remember this status for further processing.
Takes care of not losing data when pausing, and properly resume a
paused mime structure when requested.
New tests 670-673 check unpausing cases, with easy or multi
interface and mime or form api.

Fixes #4813
Reported-by: MrdUkk on github

With c-ares the dns parameters lives in ares_channel. Store them in the
curl handle and set them again in easy_duphandle.

Regression introduced in #3228 (6765e6d9

), shipped in curl 7.63.0.

Fixes #4893
Closes #5020
Signed-off-by: Ernst Sjöstrand <ernst.sjostrand@verisure.com>

Closes #5010

Reviewed-By: Daniel Stenberg
Closes #5054

Follow-up to a39e5bfb

This fixes test 198 on versions of MinGW-w64 without ftruncate

Reviewed-By: Daniel Stenberg
Reviewed-By: Marcel Raad
Closes #5055

There might be data available that was already read off the socket, for
example in the TLS layer.

Reported-by: Anders Berg
Fixes #4966
Closes #5049

Regression from 4a4b63da (and #4907)
Reported-by: vitaha85 on github
Fixes #5053
Closes #5056

Prior to this change a match would never be successful because it
was mistakenly coded to compare binary data from libssh to a
user-specified hex string (ie CURLOPT_SSH_HOST_PUBLIC_KEY_MD5).

Reported-by:  <fds242@users.noreply.github.com>

Fixes https://github.com/curl/curl/issues/4971
Closes https://github.com/curl/curl/pull/4974