Update changelog with changes in this branch

CHANGELOG.md

@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * * Tests that elementary patching/building works as expected
 * Added consistency check between e3 environment variables and path to `iocsh.bash`. `iocsh.bash` will abort if these are not consistent.
 * Add e3 version infomation to the shell prompt
+* Add option to allow override of automatic addition of `iocInit` to generated startup script
 
 ### Bugfixes
 * `iocsh.bash --help` (and variants) no longer loads tries to load `env.sh`.
@@ -28,6 +29,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Other changes
 * removed legacy code from setE3Env.bash
 * Removed usage of `env.sh` - now there is a check only for seeing if the environment variable `$IOCNAME` is set
+* Fix typos in `iocsh_functions.bash` comments
+* Rearrange usage to match order of options in code
+* Add information about realtime option to usage
 
 ## [3.4.1]