Internat.c: fix iconv() with musl by removing unrecognized EUCJP encoding
src/CMakeFiles.txt: recognize USE_MUSL=YES environment variable to compile with musl
[src/Mayaqua/Internat.c:848]: (style) The function 'DumpStr' is never used.
[src/Mayaqua/Internat.c:823]: (style) The function 'DumpUniStr' is never used.
[src/Mayaqua/Internat.c:1270]: (style) The function 'NullUniToken' is never used.
[src/Mayaqua/Internat.c:1505]: (style) The function 'StrToUtf' is never used.
[src/Mayaqua/Internat.c:1819]: (style) The function 'StrToUtf8' is never used.
[src/Mayaqua/Internat.c:3459]: (style) The function 'UniCheckStrSize' is never used.
[src/Mayaqua/Internat.c:195]: (style) The function 'UniMakeCharArray' is never used.
[src/Mayaqua/Internat.c:2896]: (style) The function 'UniReplaceFormatStringFor64' is never used.
[src/Mayaqua/Internat.c:2279]: (style) The function 'UniReplaceStri' is never used.
[src/Mayaqua/Internat.c:2387]: (style) The function 'UniSearchStri' is never used.
[src/Mayaqua/Internat.c:3390]: (style) The function 'UniStrCatLeft' is never used.
[src/Mayaqua/Internat.c:293]: (style) The function 'UniStrListToStr' is never used.
[src/Mayaqua/Internat.c:320]: (style) The function 'UniStrToStrList' is never used.
[src/Mayaqua/Internat.c:2834]: (style) The function 'UniToInti' is never used.
[src/Mayaqua/Internat.c:1490]: (style) The function 'UniToStr64' is never used.
[src/Mayaqua/Internat.c:2816]: (style) The function 'UniToStrx' is never used.
[src/Mayaqua/Internat.c:2810]: (style) The function 'UniToStrx8' is never used.
[src/Mayaqua/Internat.c:1545]: (style) The function 'UniToUtf' is never used.
[src/Mayaqua/Internat.c:232]: (style) The function 'UniTokenListToList' is never used.
[src/Mayaqua/Internat.c:1788]: (style) The function 'Utf8ToStr' is never used.
[src/Mayaqua/Internat.c:1525]: (style) The function 'UtfToStr' is never used.
[src/Mayaqua/Internat.c:1466]: (style) The function 'CopyStrToUtf' is never used.
[src/Mayaqua/Internat.c:1379]: (style) The function 'CopyUtfToStr' is never used.
[src/Mayaqua/Internat.c:3042]: (style) The function 'UniCheckStrLen' is never used.
[src/Cedar/Account.c:854]: (style) The function 'AddGroupTraffic' is never used.
[src/Mayaqua/Secure.c:1455]: (style) The function 'AddSecObjToEnumCache' is never used.
[src/Mayaqua/Network.c:18445]: (style) The function 'AddSockList' is never used.
[src/Cedar/Account.c:870]: (style) The function 'AddUserTraffic' is never used.
[src/Cedar/Server.c:1045]: (style) The function 'AdjoinEnumLogFile' is never used.
[src/Cedar/Admin.c:13780]: (style) The function 'AdminConnect' is never used.
[src/Mayaqua/Encrypt.c:855]: (style) The function 'BigNumToStr' is never used.
[src/Mayaqua/Str.c:2113]: (style) The function 'Bit128ToStr' is never used.
[src/Mayaqua/Encrypt.c:898]: (style) The function 'BufToBigNum' is never used.
[src/Mayaqua/Internat.c:1874]: (style) The function 'CalcStrToUtf8' is never used.
[src/Cedar/Hub.c:6689]: (style) The function 'CalcTrafficDiff' is never used.
[src/Mayaqua/Internat.c:1819]: (style) The function 'CalcUtf8ToStr' is never used.
[src/Mayaqua/Network.c:6495]: (style) The function 'CanGetTcpProcessId' is never used.
[src/Cedar/WinUi.c:7226]: (style) The function 'CbInsertStrA' is never used.
[src/Cedar/Client.c:3035]: (style) The function 'CcEnumObjectInSecure' is never used.
[src/Cedar/Client.c:2826]: (style) The function 'CcGetCommonProxySetting' is never used.
[src/Cedar/Client.c:2857]: (style) The function 'CcSetCommonProxySetting' is never used.
[src/Cedar/Cedar.c:575]: (style) The function 'CedarLog' is never used.
[src/Cedar/WinUi.c:9841]: (style) The function 'Center2' is never used.
[src/Mayaqua/Encrypt.c:814]: (style) The function 'CertTest' is never used.
[src/Mayaqua/Encrypt.c:809]: (style) The function 'CertTest2' is never used.
[src/Mayaqua/Encrypt.c:819]: (style) The function 'CertTest_' is never used.
[src/Mayaqua/Cfg.c:1705]: (style) The function 'CfgIsFolder' is never used.