This is done for all functions of the form Curl_read[136][624]_[lb]e.

See CRL-01-006.

- Fix connection reuse for when the proposed new conn 'needle' has a
specified local port but does not have a specified device interface.

Bug: https://curl.haxx.se/mail/lib-2016-11/0137.html
Reported-by: bjt3[at]hotmail.com

Fix warnings about conversions from long to time_t in openssl.c and
schannel.c.

Follow-up to de4de4e3

Visual C++ now complains about implicitly casting time_t (64-bit) to
long (32-bit). Fix this by changing some variables from long to time_t,
or explicitly casting to long where the public interface would be
affected.

Closes #1131

When reusing a connection, make sure the unix domain
socket option matches.

Follow-up to a4d88885. Changing the window size in that commit resulted
in a different HTTP2-Settings upgrade header, causing test 1800 to fail.

- Improve performance by using a huge HTTP/2 window size.

Bug: https://github.com/curl/curl/issues/1102


Reported-by:  <afrind@users.noreply.github.com>
Assisted-by: Tatsuhiro Tsujikawa

and warn on unrecognized lines

... and warn for too long --help lines

- In Curl_http2_switched don't call memcpy when src is NULL.

Curl_http2_switched can be called like:

Curl_http2_switched(conn, NULL, 0);

.. and prior to this change memcpy was then called like:

memcpy(dest, NULL, 0)

.. causing address sanitizer to warn:

http2.c:2057:3: runtime error: null pointer passed as argument 2, which
is declared to never be null

Reviewed-by: Nick Zitzmann

Closes #1105

Fixes test 1139 failures

Follow-up to f82bbe01

Brought in ee4f7660

Added test case 1280 to verify

Reported-by: Dave Reisner

Bug: https://github.com/curl/curl/commit/ee4f76606cfa4ee068bf28edd37c8dae7e8db317#commitcomment-19823146

Exit with an error on the first transfer error instead of continuing to
do the rest of the URLs.

Discussion: https://curl.haxx.se/mail/archive-2016-11/0038.html

Now Curl_rand() is made to fail if it cannot get the necessary random
level.

Changed the proto of Curl_rand() slightly to provide a number of ints at
once.

Moved out from vtls, since it isn't a TLS function and vtls provides
Curl_ssl_random() for this to use.

Discussion: https://curl.haxx.se/mail/lib-2016-11/0119.html

See MANPAGE.md for the description of how this works. Each command line
option is now described in a separate .d file.

Blah, I accidentally wrote size_t instead of time_t for two variables.

Reported-by: Dave Reisner

... as long is still 32bit on modern 64bit windows machines, while
time_t is generally 64bit.

This stops the compiler from potentially making invalid assumptions
about the immutability of sdp and sap across the longjmp boundary.

Previously, the [host] part was just ignored which made libcurl accept
strange URLs misleading users. like "file://etc/passwd" which might've
looked like it refers to "/etc/passwd" but is just "/passwd" since the
"etc" is an ignored host name.

Reported-by: Mike Crowe
Assisted-by: Kamil Dudka

1.1.0+ does more of this by itself so we can avoid extra processing this
way.

and remove RAND_screen from configure since nothing is using that
function

Discussed: https://curl.haxx.se/mail/lib-2016-11/0087.html

to consider ECONNREFUSED as a transient error.

Closes #1064