require Python 2.4

doc/INSTALL.txt

@@ -9,14 +9,13 @@ Building and installing Zope from source
 
 System requirements when building from source
 
-   bash or another Bourne shell variant
-   Python 2.3.5 or later installed somewhere in the system PATH
-   (Note: Python 2.4 is officially *not* supported because there has not
-   been a security audit for Python 2.4 and Zope 2 so far. If you use
-   Python 2.4 with Zope then you use it at your own risk from the security
-   perspective).
-   GNU make
-   A C compiler (gcc recommended)
+   * bash or another Bourne shell variant
+
+   * Python 2.4.1 or later installed somewhere in the system PATH
+
+   * GNU make
+
+   * A C compiler (gcc recommended)
 
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