Updated documentation for new Embarcadero C++ Builder compiler selection

    * ACE/ACE-INSTALL.html:

ACE/ACE-INSTALL.html

@@ -683,15 +683,10 @@ <h3><a name="embarcadero">Building and Installing ACE on Windows with Embarcader
       Codeguard support. Should only be used when DEBUG is also set<br>
       <code>set CODEGUARD=1</code><br>
       <br>
-      By default we are using the clang based compilers. At the moment you
-      want to compile using the old bcc32 compiler set the CLASIC environment variable<br>
-      <code>set CLASSIC=1</code><br>
-      <br>
-      Set the environment variable below to build a version of ACE optimized
-      for a certain CPU. For this there are special compiler flags
-      (-3/-4/-5/-6), see the Embarcadero help for more info.<br>
-      <code>set CPU_FLAG=-6</code><br>
+      Set one of the following environment variable to 1 to select which Embarcadero
+      C++ compiler has to be used. Valid environment variables are BCC32, BCC32C, and BCC64.
       <br>
+      <code>set BCC32=1</code><br>
       You can then start the build with the command
       <br><code>make -f Makefile.bmak all</code><br>
       <br>