* docs/DEBUG.TXT: adding debugging support documentation

    * src/base/ftdebug.c (ft_debug_init), builds/win32/ftdebug.c
    (ft_debug_init), builds/amiga/src/ftdebug.c (ft_debug_init): changed the
    syntax of the FT2_DEBUG environment variable  used to control debugging
    output (i.e. logging and error messages). It must now look like:

       any:6 memory:4 io:3   or
       any:6,memory:4,io:3   or
       any:6;memory:4;io:3
diff --git a/src/base/ftdebug.c b/src/base/ftdebug.c
index 4c6bcc5..65c823d 100644
--- a/src/base/ftdebug.c
+++ b/src/base/ftdebug.c
@@ -86,7 +86,7 @@
 #define FT_TRACE_DEF(x)  #x ,
 
   static const char*  ft_trace_toggles[trace_count + 1] =
-  { 
+  {
 #include FT_INTERNAL_TRACE_H
     NULL
   };
@@ -98,9 +98,9 @@
   /*                                                                       */
   /* Initialize the tracing sub-system.  This is done by retrieving the    */
   /* value of the "FT2_DEBUG" environment variable.  It must be a list of  */
-  /* toggles, separated by spaces, `;' or `:'.  Example:                   */
+  /* toggles, separated by spaces, `;' or `,'.  Example:                   */
   /*                                                                       */
-  /*    "any=3 memory=6 stream=5"                                          */
+  /*    "any:3 memory:6 stream:5"                                          */
   /*                                                                       */
   /* This will request that all levels be set to 3, except the trace level */
   /* for the memory and stream components which are set to 6 and 5,        */
@@ -116,48 +116,48 @@
   ft_debug_init( void )
   {
     const char*  ft2_debug = getenv( "FT2_DEBUG" );
-    
+
     if ( ft2_debug )
     {
       const char*  p = ft2_debug;
       const char*  q;
-      
+
 
       for ( ; *p; p++ )
       {
         /* skip leading whitespace and separators */
-        if ( *p == ' ' || *p == '\t' || *p == ':' || *p == ';' || *p == '=' )
+        if ( *p == ' ' || *p == '\t' || *p == ',' || *p == ';' || *p == '=' )
           continue;
-          
-        /* read toggle name, followed by '=' */
+
+        /* read toggle name, followed by ':' */
         q = p;
-        while ( *p && *p != '=' )
+        while ( *p && *p != ':' )
           p++;
-          
-        if ( *p == '=' && p > q )
+
+        if ( *p == ':' && p > q )
         {
           int  n, i, len = p - q;
           int  level = -1, found = -1;
-          
+
 
           for ( n = 0; n < trace_count; n++ )
           {
             const char*  toggle = ft_trace_toggles[n];
-            
+
 
             for ( i = 0; i < len; i++ )
             {
               if ( toggle[i] != q[i] )
                 break;
             }
-            
+
             if ( i == len && toggle[i] == 0 )
             {
               found = n;
               break;
             }
           }
-          
+
           /* read level */
           p++;
           if ( *p )
@@ -166,7 +166,7 @@
             if ( level < 0 || level > 6 )
               level = -1;
           }
-          
+
           if ( found >= 0 && level >= 0 )
           {
             if ( found == trace_any )