Log Message:
chat/ejabberd: Update to 18.03.

Admin
- Avoid logging IP addresses in mod_register when it's not desired
- Command 'reload-config' allows to reload certificates
- Get rid of 'fs' package dependency
- Improve log message when module startup has failed
- mod_muc_admin: New command get_room_affiliation
- prosody2ejabberd: Report meaningful error when luerl is not
  available

Configure
- Accept atoms in api_permission command lists and commands with
  numbers in them
- Validate additional listen opts: inet, inet6, backlog
- Remove 'iqdisc' option
- New option –enable-group=xxx
- New option 'negotiation_timeout'
- New option 'new_sql_schema'
- New option 'validate_stream'
- ejabberd_service: New option 'global_routes' for
- mod_avatar: New 'rate_limit' option
- mod_block_strangers: New 'access' option
- mod_block_strangers: New 'captcha' option
- mod_pubsub: New option 'force_node_config'

Miscelanea
- Simplify ejabberd_sup code
- New gen_mod mod_options/1 callback to provide known options and
  defaults
- Replace ?MYLANG with connection's language wherever possible
- sql/*: Add username to peer indexes
- cyrsasl: Simplify code for splitting auth string in cyrsasl
- ejabberd_auth: Cache 'isuser' queries to external auth program
- ejabberd_web_admin: Hardcode required ACL rules
- mod_admin_extra: Command check_password_hash supports all hash
  methods
- mod_admin_extra: Fix srg_get_info command with @all@ and @online@
- mod_avatar: Fulfill all requirements of XEP-0398 v0.2.0
- mod_avatar: Improve validation of 'convert' option
- mod_block_strangers: Bounce groupchat to bare JID
- mod_block_strangers: Fix a typo in call to create_captcha()
- mod_caps: Only store CAPS if contact is subscribed
- mod_carboncopy: Copy outgoing MUC PMs
- mod_mam: Really run use_cache/1 and cache_nodes/1 callbacks
- mod_pubsub: Remove items of unregistered user
- mod_push_keepalive: Preserve timeout on resumption
- mod_shared_roster: Try to fix ejabberd_c2s:process_info: got
  unexpected info
- mod_shared_roster_ldap: Fix processing of ldap_memberattr_format_re
  option
- mod_stream_mgmt: Abort connection on count error
- mod_stream_mgmt: Clean up on timed out resumption