Update to ejabberd 18.12

Merge pull request #188 from mwlczk/18.09

Bump version to 18.09

Merge pull request #176 from girishramnani/patch-1

Updated readme to the current version

copy old dhpam filename to new

fixed test if variable EJABBERD_SSLCERT_HOST is set

fixed test if variable EJABBERD_SSLCERT_HOST is set

Merge branch 'master' of github.com:rroemhild/docker-ejabberd

Update to ejabberd version 18.01

Merge branch 'MaZderMind-feature/140-specify-custom-cert-paths-per-do…

…main'

Add post startup script to create shared roster groups and add member…

…s. (#112)