merge SUCS punbb customisations

lib/punbb/admin_index.php

lib/punbb/admin_maintenance.php

lib/punbb/extern.php

lib/punbb/footer.php

lib/punbb/header.php

lib/punbb/include/cache.php

lib/punbb/include/common.php

lib/punbb/include/dblayer/pgsql.php

lib/punbb/include/email.php

lib/punbb/include/functions.php

lib/punbb/include/parser.php

lib/punbb/include/search_idx.php

lib/punbb/include/template/admin.tpl

lib/punbb/include/template/help.tpl

lib/punbb/include/template/main.tpl

lib/punbb/include/template/maintenance.tpl

lib/punbb/include/template/redirect.tpl

lib/punbb/install.php

lib/punbb/login.php

lib/punbb/profile.php