Update the INSTALL file a bit to talk about sfrotz.

diff --git a/INSTALL b/INSTALL
index f78fa01a00411eee1bb2aa831b4b58bbc042ee17..fe55e6ab2b3235fa3d26604f160972cbeb844534 100644 (file)
--- a/INSTALL
+++ b/INSTALL
@@ -39,6 +39,19 @@ platform-specific info below.
 It's always a good idea to have the GNU version of make(1) around.
 
 
+============
+SDL Frotz ||
+============
+
+SDL Frotz (aka sfrotz) started off as a port of Frotz 2.32.  After 
+languishing for several years, it is now incorporated into the Unix 
+Frotz codebase as a one of the available interfaces.
+
+Prerequisite packages for sfrotz:
+  * libsdl2-dev
+  * libsdl2-mixer-dev
+
+
 =======================
 Editing the Makefile ||
 =======================