Combine CJK encoding conversion code in a single source file

This will make it easier to combine duplicated code between all the
CJK text encodings (a significant amount is already combined in this
commit, such as the repeated definitions of SJIS_DECODE and
SJIS_ENCODE), but I hope to remove even more redundancy in the future.

The table used to implement mb_strlen for CP932 has been changed to
the same table as "SJIS-win".

Author: alexdowad

ext/mbstring/config.m4

@@ -95,30 +95,12 @@ AC_DEFUN([PHP_MBSTRING_SETUP_LIBMBFL], [
     libmbfl/filters/html_entities.c
     libmbfl/filters/mbfilter_7bit.c
     libmbfl/filters/mbfilter_base64.c
-    libmbfl/filters/mbfilter_big5.c
-    libmbfl/filters/mbfilter_cp5022x.c
-    libmbfl/filters/mbfilter_cp51932.c
-    libmbfl/filters/mbfilter_cp932.c
-    libmbfl/filters/mbfilter_cp936.c
-    libmbfl/filters/mbfilter_gb18030.c
-    libmbfl/filters/mbfilter_euc_cn.c
-    libmbfl/filters/mbfilter_euc_jp.c
-    libmbfl/filters/mbfilter_euc_jp_win.c
-    libmbfl/filters/mbfilter_euc_kr.c
-    libmbfl/filters/mbfilter_euc_tw.c
+    libmbfl/filters/mbfilter_cjk.c
     libmbfl/filters/mbfilter_htmlent.c
-    libmbfl/filters/mbfilter_hz.c
-    libmbfl/filters/mbfilter_iso2022_jp_ms.c
-    libmbfl/filters/mbfilter_iso2022jp_mobile.c
-    libmbfl/filters/mbfilter_iso2022_kr.c
-    libmbfl/filters/mbfilter_jis.c
     libmbfl/filters/mbfilter_qprint.c
     libmbfl/filters/mbfilter_singlebyte.c
-    libmbfl/filters/mbfilter_sjis.c
-    libmbfl/filters/mbfilter_sjis_2004.c
     libmbfl/filters/mbfilter_ucs2.c
     libmbfl/filters/mbfilter_ucs4.c
-    libmbfl/filters/mbfilter_uhc.c
     libmbfl/filters/mbfilter_utf16.c
     libmbfl/filters/mbfilter_utf32.c
     libmbfl/filters/mbfilter_utf7.c

ext/mbstring/config.w32

@@ -17,17 +17,13 @@ if (PHP_MBSTRING != "no") {
 			"ext\\mbstring\\libmbfl\\config.h", true);
 
 		ADD_SOURCES("ext/mbstring/libmbfl/filters", "html_entities.c \
-			mbfilter_7bit.c mbfilter_base64.c mbfilter_big5.c mbfilter_cp932.c \
-			mbfilter_cp936.c mbfilter_cp51932.c mbfilter_euc_cn.c \
-			mbfilter_euc_jp.c mbfilter_euc_jp_win.c mbfilter_euc_kr.c \
-			mbfilter_euc_tw.c mbfilter_htmlent.c mbfilter_hz.c mbfilter_iso2022_kr.c \
-			mbfilter_jis.c mbfilter_iso2022_jp_ms.c mbfilter_gb18030.c \
-			mbfilter_sjis_2004.c mbfilter_qprint.c mbfilter_sjis.c mbfilter_ucs2.c \
-			mbfilter_ucs4.c mbfilter_uhc.c mbfilter_utf16.c mbfilter_utf32.c \
+			mbfilter_7bit.c mbfilter_base64.c \
+			mbfilter_cjk.c mbfilter_htmlent.c \
+			mbfilter_qprint.c mbfilter_ucs2.c \
+			mbfilter_ucs4.c mbfilter_utf16.c mbfilter_utf32.c \
 			mbfilter_utf7.c mbfilter_utf7imap.c mbfilter_utf8.c \
 			mbfilter_utf8_mobile.c mbfilter_uuencode.c \
-			mbfilter_cp5022x.c \
-			mbfilter_iso2022jp_mobile.c mbfilter_singlebyte.c", "mbstring");
+			mbfilter_singlebyte.c", "mbstring");
 
 		ADD_SOURCES("ext/mbstring/libmbfl/mbfl", "mbfilter.c mbfilter_8bit.c \
 			mbfilter_pass.c mbfilter_wchar.c mbfl_convert.c mbfl_encoding.c \