DOC: Changelog

CHANGELOG.md

@@ -5,6 +5,8 @@
 * If the `${LDFLAGS}` environment variable is set in the environment, any
   `-L` options are dropped from it, so that the `$FSLDEVDIR` can explicitly
   be set to take precedence over `$FSLDIR`.
+* `${FSLDEVDIR}` doesn't have to exist - if it is set before
+  `${FSLDIR}/etc/fslconf/fsl-devel.sh` is run, it will not be overridden.
 
 
 ## 2111.8 (Friday 26th November 2021)