reviewed string actions

[Fatema080136]

From my point of view, the following example: [A|B] = string/ncd( "BZIP|GZIP|DEFLATE|PACK200|XZ", "foo bar", "test foo", "bar foo" );

could written as: [A|B] = string/ncd( "BZIP", "foo bar", "test foo", "bar foo" );

Run with individual compression algorithm, works correctly. But [A|B] = string/ncd( "XZ", "foo bar", "test foo", "bar foo" ); Shows error.

Did not change this things within ncd action, as I am not sure.

[flashpixx]

| is equal to "or", so it is only a short description