SetVoiceStack looks for "!v" in variant_name and skips the first
three characters if "!v" is found. The problem here is that it
does not check that the third character is the path separator, so
may advance into unknown memory if variant_name is exactly "!v".

This fixes that problem by checking for the path separator. It
also simplifies the logic by checking the bytes explicitly.

NOTE: This is not strictly needed, as the only code paths this is
relevant for is in espeak_ng_SetVoiceByName, and the variant name
comes from ExtractVoiceVariantName, which sets up the variant name
correctly.

Various places call SetVoiceStack with "" for the variant_name. This
causes -fsanitize=address to fail with an overflow as the call to
memcmp is checking the first 2 bytes, and there is only 1 byte
available.

use parameters instead of globals

move: attrcmp() and attrlookup()
new file ssml.c added to Makefile.am

Fixes #401.

The definitions for towlower() and towupper() are defined in /usr/include/wctype.h on FreeBSD platforms. I just removed the define and used  the ucd_ equivilent where towlower/towupper were found.

/bin/sh ./libtool  --tag=CC   --mode=compile cc -DHAVE_CONFIG_H -I.    -fPIC -fvisibility=hidden -pedantic -fno-exceptions -D PATH_ESPEAK_DATA=\"/usr/local/share/espeak-
ng-data\" -DLIBESPEAK_NG_EXPORT  -Isrc/include -Isrc/include/compat -I src/ucd-tools/src/include -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112L -Wno-endif-lab
els    -g -O2 -std=c99 -MT src/libespeak-ng/src_libespeak_ng_la-readclause.lo -MD -MP -MF src/libespeak-ng/.deps/src_libespeak_ng_la-readclause.Tpo -c -o src/libespeak-n
g/src_libespeak_ng_la-readclause.lo `test -f 'src/libespeak-ng/readclause.c' || echo './'`src/libespeak-ng/readclause.c
libtool: compile:  cc -DHAVE_CONFIG_H -I. -fPIC -fvisibility=hidden -pedantic -fno-exceptions -D PATH_ESPEAK_DATA=\"/usr/local/share/espeak-ng-data\" -DLIBESPEAK_NG_EXPO
RT -Isrc/include -Isrc/include/compat -I src/ucd-tools/src/include -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112L -Wno-endif-labels -g -O2 -std=c99 -MT src/li
bespeak-ng/src_libespeak_ng_la-readclause.lo -MD -MP -MF src/libespeak-ng/.deps/src_libespeak_ng_la-readclause.Tpo -c src/libespeak-ng/readclause.c  -fPIC -DPIC -o src/l
ibespeak-ng/.libs/src_libespeak_ng_la-readclause.o
In file included from src/libespeak-ng/readclause.c:32:
In file included from src/include/compat/wctype.h:30:
/usr/include/wctype.h:73:8: error: conflicting types for 'ucd_tolower'
wint_t  towlower(wint_t);
        ^
src/include/compat/wchar.h:37:18: note: expanded from macro 'towlower'
                 ^
src/ucd-tools/src/include/ucd/ucd.h:503:13: note: previous declaration is here
codepoint_t ucd_tolower(codepoint_t c);
            ^
In file included from src/libespeak-ng/readclause.c:32:
In file included from src/include/compat/wctype.h:30:
/usr/include/wctype.h:74:8: error: conflicting types for 'ucd_toupper'
wint_t  towupper(wint_t);
        ^
src/include/compat/wchar.h:38:18: note: expanded from macro 'towupper'
                 ^
src/ucd-tools/src/include/ucd/ucd.h:491:13: note: previous declaration is here
codepoint_t ucd_toupper(codepoint_t c);
            ^
src/libespeak-ng/readclause.c:366:19: warning: implicit declaration of function 'mkstemp' is invalid in C99 [-Wimplicit-function-declaration]
                        if ((fd_temp = mkstemp(fname_temp)) >= 0)
                                       ^
1 warning and 2 errors generated.

1.  Store the encoding enumeration values in the Translation
    object, instead of the charset table.

2.  Use the encoding.c charset table data instead of the ones
    in translate.c.

3.  Remove the charset language file option -- it is only used
    in the Arabic language file, but is used incorrectly there.

4.  Specify ISO 8859-6 for the 8-bit encoding for Arabic instead
    of UTF-8, so that espeakCHARS_8BIT and espeakCHARS_AUTO work
    correctly for Arabic.

Moved include/espeak/speak_lib.h to include/espeak-ng/speak_lib.h and
created a symlink from the original location.