chandi requested to merge audit/fixes-critical into master Feb 18, 2019

fixes a bunch of SQL injections. see #472 (closed)

list

SQL Injection in GeoCleanXhr::masterupdate()
SQL Injection in BellGateway::setBellsAsSeen()
SQL Injection in MessageModel::getBetriebname()
SQL Injection in MessageModel::getChatMembers()
SQL Injection in MessageModel::addConversation()
SQL Injection in MessageModel::loadConversationMessages()
SQL Injection in QuizModel::getExsistingSession()
SQL Injection in SettingsModel::logChangedSetting()
SQL Injection in WorkGroupModel::updateTeam()