Add x509 files to static node allowing postfix to work (solves #6577) + minor lint.

https://leap.se/code/issues/6577

Change-Id: Iefefbf3e8fc5c13cdd7e302627504a76b856e725
Merge branch 'develop' into 'develop'

Add x509 files to static node allowing postfix to work (solves #6577)

See merge request !22