SPADs major update

  1) Actions in spads.conf
  ------------------------
- remove following global setting definitions:

# SPADS files
  binDir

# AutoUpdate
  autoUpdateBinaries

# Spring files
  onBadSpringVersion


- remove following preset setting definitions:

#Requirements for giving battle password
  minRankForPasswd
  minLevelForPasswd

- add following global setting definitions:

# SPADS files
  instanceDir:

#Spring files
  autoManagedSpringVersion:
  autoManagedSpringDir:spring
  unitsyncDir:<absolute_path_of_the_directory_containing_the_unitsync_library>

# Logging system
  simpleEventLogLevel:4

# Miscellaneous
  eventModel:auto
  maxChildProcesses:16
- rename the "minLevelForIpAddr" global setting to "privacyTrustLevel"
- check the value of the "springieEmulation" global setting:
  if it is set to "on" (old default value), change it to "warn"
- check the value of the "kickBanDuration" global setting:
  if it is set to "120" (old default value), change it to 300

#plugins
- check the value of the "pluginsDir" global setting:
  if it is empty (old default value), set it to "plugins" and create the subdirectory "plugins" in the directory pointed by the "varDir" global setting
  if it is not empty, ensure the corresponding directory exists

# Automatic features
- check the allowed values for the "balanceMode" preset setting:
  if one of the values is "clan" (second value in default configuration), change it to "clan;random"

  2) Other actions
  ----------------
- create the subdirectory "spring" in the directory pointed by the "varDir" global setting
- remove the "!pass" command declaration in commands.conf:
  remove the line "[pass]" and the non-empty line(s) just after, such as "::|0:"
- following plugins must be updated to latest version if you plan to use them: FirstWelcomeMsg, InGameMute, ReverseLookup

  3) Optional actions
  -------------------
- if you are hosting several SPADS instances running from same SPADS installation, then you need to adjust your "varDir" and "instanceDir" global settings in spads.conf:
  the "varDir" global setting no longer needs to be different for each SPADS instance (and it can be an absolute path or a path relative to SPADS installation directory), so you can set it back to default value: "var"
  the "instanceDir" global setting is the directory which must be different for each SPADS instance, so you can set it to your old "varDir" value
- if you want to use the new "Spring version auto-management" functionality of SPADS (recommended), in spads.conf:
  set the "autoManagedSpringVersion" global setting to the desired Spring version (example: "103.0")
  set the "springServer" and "unitsyncDir" global settings to empty values
  set the "springServerType" global setting to "dedicated" (or "headless" if you want to use headless server)
  remove any Spring data directory containing Spring base files (content specific to a given Spring version) from "springDataDir" global setting value

  4) Post-update action
  ---------------------
- finally, after the "./update.pl <release> -f -a" command has been executed, the Perl unitsync library interface module must be re-generated (on Linux system only):
  "./spadsInstaller.pl -g"