(legacy) move ipsec_idinfo_to_text into vpn_ipsec.conf, move copyright notice with it and cleanup some spacing

Reworked action buttons for list operations

Revert "(legacy) move ipsec_idinfo_to_text into vpn_ipsec.conf, move copyright notice with it and cleanup some spacing"

This reverts commit 96e8bd4c.

(legacy) move ipsec_idinfo_to_text into vpn_ipsec.conf, move copyright notice with it and cleanup some spacing

unbound: introducing overwriting of MX records

(ipsec, legacy) add ipsec (mobile) leases to diag and widget, rename "ipsec list_status" to "ipsec list status", closes https://github.com/opnsense/core/issues/139

(legacy/ipsec) add "Connection method" to phase1 settings, closing https://github.com/opnsense/core/issues/477

(legacy/ipsec) fixes for certref, caref, trust config data instead of reengineering authentication_method again...

DHCP: change column of lease table from "Online" to "Status"

fix for #504

Previously it was not possible to add two host override entries for the same
host-domain combination. Technically this restriction does not exist neither
within unbound nor DNS.

  * Added missing tooltips for existing buttons for list management (add line,
    remove line, move line, clone line)
  * Shortened existing tooltip texts to a minimum
  * Fixed incorrect tooltip texts
  * Changed order of buttons to 1. move item, 2. delete item, 3. add item, 4.
    clone item
  * Changed tooltips "click to toggle enable/disable rule" to "disable rule" and
    "enable rule" corresponding to the current state, respectively.

Changed button icon of "add similar item" from plus to clone symbol.

(legacy) refactor status_graph.php, consolidate ifstats.php and bandwidth_by_ip.php into legacy_traffic_stats.php, leave graph.php as it is for now (although replacing should be a good idea)