Add post about mkksiso updates

_posts/2021-12-15-mkksiso.md

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+---
+layout: post
+title: mkksiso updates
+author: bcl
+tags: lorax
+---
+
+In Lorax 36.3 I have fixed a number of `mkksiso` bugs reported by Zdenek Veleba
+(thanks!), it now allows filenames up to 253 characters, and will
+return an error if any of them are longer than that. Return codes are now working,
+so you can check for errors in scripts, and there was a bunch of cleanup of support
+for the other arches.
+
+`mkksiso` is used to take a boot.iso and add a kickstart to it, creating an iso that
+will be automatically installed when it is booted. You can optionally add new directories
+to the iso and reference them from the kickstart like this:
+
+    repo --name=extra-repo --baseurl=file:///run/install/repo/extra-repo/
+
+Read the [full documentation here](https://weldr.io/lorax/mkksiso.html).