* src/iri.c: Check for libidn2 < 0.14 to include libunistring headers
The unistring functions are used only when an older version of libidn2
is used, so don't include its headers either w/newer libdin2 versions.
* .travis.yml: Install libidn2-dev instead libidn11-dev.
* bootstrap.conf: Add modules libunistring-optional, unistr/base,
unicase/tolower.
* configure.ac: Check for libidn2.
* src/Makefile.am: Add $(LTLIBUNISTRING) to LDADD.
* tests/Makefile.am: Set LDADD similar to LDADD in src/Makefile.am
* src/connect.c: Use libidn2 code instead of libidn.
* src/host.c: Likewise.
* src/iri.c: Likewise.
* src/iri.h: Likewise.
* src/options.h: Likewise.
* src/url.c: Likewise.
* src/url.h: Likewise.
* src/log.c: Fix C99 comment.
IDN2003 should not be used any more due to security concerns.
We use libunistring (resp. the unicode code from gnulib) for
lowercasing UTF-8 before we give data to libidn2.
TR#46 is missing, no support in libidn2 nor in libunistring.
* src/iri.c: Kick out the last converted character from iconv()
Thanks to Eli Zaretskii <eliz@gnu.org> for suggesting the fix.
Reported-by: "Andries E. Brouwer" <Andries.Brouwer@cwi.nl>
* src/iri.c (do_conversion): Call url_unescape_except_reserved,
instead of url_unescape.
* src/url.c (url_unescape_1): New static function.
(url_unescape): Calls url_unescape_1 with mask zero. Preserves
same behavior as before. Only code changes.
(url_unescape_except_reserved): New function.
* src/url.h: Added prototype for url_unescape_except_reserved().
When the locale is US-ASCII, URIs that contain special characters
in them are converted to IRIs according to RFC 3987, section 3.2
"Converting URIs to IRIs".
* src/iri.c (remote_to_utf8): Do not qualify with const the output pointer.
(do_conversion): Use the provided input parameter as const.
(idn_encode): casts to remote_to_utf8 parameters are no longer needed.
* src/iri.h: Adjusted remote_to_utf8 prototype.
* src/url.c: It is no longer necessary to cast new_url to const char.
xfree() might crash on libidn memory on Windows.
From 'man idn_free':
"Under Windows, different parts of the same application may use different
heap memory, and then it is important to deallocate memory allocated within
the same module that allocated it. This function makes that possible."
Having an unknown local encoding made Wget crash.
We also fix a wrong 'Conversion from ...' message and
changed two logging messages into debug messages.
Reported-by: Mikael Magnusson <mikachu@gmail.com>
