Allow overriding of finalization program

[Shushe] / README.markdown

diff --git a/README.markdown b/README.markdown
index 2cefb62ae9079e0fc99979fb61d531a2a6666d6c..6b865aeb07499008c86d550e253ae89cdcc51820 100644 (file)
--- a/README.markdown
+++ b/README.markdown
@@ -317,6 +317,11 @@ The following additional variables can be used to control the behaviour
   A white·space‐separated list of media types or media type suffixes to
     consider X·M·L (default: `application/xml text/xml +xml`).
 
+- **`FINALIZE`:**
+  A program to run on (unspecial) X·M·L files after they are
+    transformed (default: `xmllint --nonet --nsclean`).
+  This variable can be used for postprocessing.
+
 - **`THISREV`:**
   The current version of ⛩️📰 书社 (default: derived from the current
     git tag/branch/commit).