Add more input validation to the SQL module

  $fr_group    = $::freeradius::params::fr_group

  # Validate our inputs

  if ($database != 'mysql' and $database != 'mssql' and $database != 'oracle' and $database != 'postgresql') {

    error('$database must be one of mysql, mssql, oracle, postgresql')

  # Validate multiple choice options

  unless $database in ['mysql', 'mssql', 'oracle', 'postgresql'] {

    fail('$database must be one of mysql, mssql, oracle, postgresql')

  }

  # Hostnames

  unless (is_hostname($server) or is_ip_address($server) {

    fail('$server must be a valid hostname or IP address')

  }

  # Validate integers

  unless is_integer($port) {

    fail('$port must be an integer')

  }

  unless is_integer($num_sql_socks) {

    fail('$num_sql_socks must be an integer')

  }

  unless is_integer($lifetime) {

    fail('$lifetime must be an integer')

  }

  unless is_integer($max_queries) {

    fail('$max_queries must be an integer')

  }

  unless is_integer($connect_failure_retry_delay) {

    fail('$connect_failure_retry_delay must be an integer')

  }

  # Fake booleans (FR uses yes/no instead of true/false)

  unless $deletestalesessions in ['yes', 'no'] {

    fail('$deletestalesessions must be yes or no')

  }

  unless $sqltrace in ['yes', 'no'] {

    fail('$sqltrace must be yes or no')

  }

  unless $read_groups in ['yes', 'no'] {

    fail('$read_groups must be yes or no')

  }

  unless $readclients in ['yes', 'no'] {

    fail('$readclients must be yes or no')

  }

  # Generate a module config, based on sql.conf