* updated META.yml to match the Makefile dependancies
* Updated Dockerfile to debian 10 with mariadb libraries
* rewritten Dockerfile; added startup.sh to improve startup procedure; changed dummy value in nt_vars
* Makefile.PL requirements changed from mysql to MariaDB (#262)
* Listen 443 is already present in /etc/apache2/sites-enabled/000-default.conf and causes issues (#263)
* Improved nt_export to allow MariaDB dsn (#264)

Co-authored-by: Gerhard Steinbeis <[email protected]>

* New Features
    * allow A records in in-addr.arpa #230
    * import
        * tinydns type 'S' records #246
        * bind: add CAA imports #225
    * client: add SSHFP algos 4 & 6 #303
    * export/BIND: add sort order #270
* Fixes
    * bump DB version to 2.35 on new install (was 2.27)
    * sql
        * add quotes to rank (now a MySQL keyword)
        * don't save empty strings for INTs #268
        * zone.last_publish: TIMESTAMP DEFAULT 0 -> DATETIME DEFAULT NULL #249
    * SRV: always octal_escape numbers correctly #302
    * CAA: remove any quotes added to domain name #302
    * update MANIFEST path #302
    * NAPTR: do not export/encode quotes #302
    * NAPTR: tinydns export fix #297
    * URI: tinydns export needs target escaped #296
    * export: store last ts separate #247
    * client: fix user password change #241
* Updates & Changes
    * client: add help for CAA records #219
    * client: require NAPTR replacement #221
    * client: only send cookie when secure #181
    * zr/sanity: don't allow spaces in names #238
    * import/bind: strip trailing dot from zone #248
    * import/bind: report reason on rejected records #178
    * import/tinydns:
        * append trailing . to SOA mname and rname if missing #166
        * anchor record type detection for case lowering #165
        * add imports for type 3 & 6 (IPv6 patch) #167
        * handle ascii and binary in AAAA rdata #163
        * improved TXT & SPF imports #171
    * disable SPF records by default (flip DB flag to enable) #168
    * expand UTF support to cover all UTF8 characters (requires MySQL 5.5+)
        * change table encoding from utf8 (3 bits) to utf8mb4 (4 bits) #170
    * Export/BIND: export CAA correctly #193
    * Export/BIND/dyn: fixes for ZR updates #199, #306
    * Export/Dyn: more robust handling of zone deletions, that could
      result in a new zone with the same name getting unpublished.
    * Exports: split long SPF records into 255 byte strings #173
    * Exports: run postflight after no-change export
    * session: prune pass_salt from result hash
    * session: omit sessions from deleted groups
    * test: delete tests already migrated to nt3
    * zone2nic: match domain w/o case #254
    * improved sql/create_tables.pl #190
    * docker: container updates #300, #269, #267, #266, #265, #264, #263, #262, #260