"if(a)" is our style, not "if( a )"

Since it now supports multiple files this will be faster and will show
problems for more file than one at a time - more convenient.

It now scans multiple files and outputs an error+warning count summary
at the end in case at least one was detected.

-D can be used to specify in which dir the files are located

The script now scans for conditions that starts with a space for
if/while/for lines.

And make the build fail if a warning or error was detected

By the use of a the new lib/checksrc.pl script that checks that our
basic source style rules are followed.

For now provide prototypes instead of including the
non-standard normalisation.h which is only available in the
"Internationalized Domain Names Mitigation APIs" download.

asyn-ares.c and asyn-thread.c are two separate backends that implement
the same (internal) async resolver API for libcurl to use. Backend is
specified at build time.

The internal resolver API is defined in asyn.h for asynch resolvers.

Fixed indents, coding conventions and white space edits.

Modified the c-ares completion callback function to again NOT read the
conn data when the ares handle is being taken down as then it may have
been freed already.

Introducing an internal API for handling of different async resolver
backends.

For now we directly import the Idn* symbols with the linker;
an upcoming release of OWC will have these added to the import
lib normaliz.lib, and prototypes are added to winnnls.h.

Rewritten code from a patch brought by Matteo Rocco.

Found with codespell.

Found with codespell.

Found with codespell.

Found with codespell.

Make sure that files are closed before the post quote commands run as if
they operate on the just transferred file they could otherwise easily
fail.

Patch by: Rajesh Naganathan (edited)

libcurl failed to check the correct struct for HTTPS after CONNECT was
issued to the proxy, so it didn't do the TLS handshake and subsequently
failed the connection. A regression released in 7.21.5 (introduced
around commit 8831000b).

Bug: http://curl.haxx.se/mail/lib-2011-04/0134.html
Reported by: Josue Andrade Gomes

When set to a HTTP 1.0 proxy, that only affects the CONNECT request and
not the regular HTTP request.

Made it compile and work again after the code move.

Massively reduce #ifdefs all over (23 #ifdef lines less so far)
Moved conversion-specific code to non-ascii.c

It is now possible to use any combination of features without
having to 1st add makefile targets to the main makefile. The
main makefile now passes the 'mingw32-feat1-feat2' as var CFG,
and the ./[lib|src]/Makefile.m32 parses the CFG var to determine
the features to be enabled.

changed windows.h include to system header;
changed obsolete 2nd check for str_w to str_utf8 in order to catch
malloc() failure and avoid a free(NULL);
changed calls to GetLastError() to void to kill unsused var compiler
warnings;
moved one call to GetLastError() into else case so that its only
called when WideCharToMultiByte() really fails.

Provide prototype for curl_win32_idn_to_ascii();
remove wrong 3rd parameter from curl_win32_idn_to_ascii() call.