fix: use ut8 encoding for config and filenames

Config values can now carry non-ascii values. This required also configuring
allegro to treat file paths as UTF8.

Fonts have varying support for characters outside ASCII characters.
Probably we currently have no fonts that adequately cover non-latin
characters. While you may see gibberish in the file picker, files should
still load just fine.

allegro-legacy/src/file.c

@@ -77,7 +77,7 @@ static PACKFILE_VTABLE normal_vtable;
 
 static PACKFILE *pack_fopen_special_file(AL_CONST char *filename, AL_CONST char *mode);
 
-static int filename_encoding = U_ASCII;
+static int filename_encoding = U_UTF8;
 
 
 #define FA_DAT_FLAGS  (FA_RDONLY | FA_ARCH)

src/launcher/launcher.cpp

@@ -84,7 +84,6 @@ int32_t main(int32_t argc, char* argv[])
 {
 	common_main_setup(App::launcher, argc, argv);
 
-	set_uformat(U_ASCII);
 	zc_srand(time(0));
 
 

src/zc/title.cpp

@@ -671,8 +671,6 @@ static void DX_mainscreen(int32_t f)
 	FFCore.skip_ending_credits = 0;
 	for ( int32_t q = 0; q < 256; q++ ) runningItemScripts[q] = 0; //Clear scripts that were running before. 
 
-	set_uformat(U_ASCII);
-
 	static int32_t pic=0;
 	//char tbuf[80];
 	char tbuf[2048] = {0}; char tbuf2[2048] = {0};
@@ -895,8 +893,6 @@ static void v25_mainscreen(int32_t f)
 	FFCore.skip_ending_credits = 0;
 	for ( int32_t q = 0; q < 256; q++ ) runningItemScripts[q] = 0; //Clear scripts that were running before. 
 
-	set_uformat(U_ASCII);
-
 	static int32_t pic=0;
 	//char tbuf[80];
 	char tbuf[2048] = {0}; char tbuf2[2048] = {0};

src/zc/zelda.cpp

@@ -4795,8 +4795,6 @@ int main(int argc, char **argv)
 
 	mididata = (DATAFILE*)datafile[ZC_MIDI].dat;
 
-	set_uformat(U_ASCII);
-
 	allocate_crap();
 
 	//script drawing bitmap allocation

src/zq/zquest.cpp

@@ -28808,9 +28808,6 @@ int32_t main(int32_t argc,char **argv)
 
 
 	zc_srand(time(0));
-
-
-	set_uformat(U_ASCII);
 
 	Z_message("Initializing Allegro... ");
 	if(!al_init())