SVG graph, includes, php

Influence SVG graph:

cd /usr/share/zabbix
grep -r "'SVG_GRAPH_MAX_NUMBER_OF_METRICS'" .
grep -r "'ZBX_WIDGET_ROWS'" .
grep -r " LEGEND_LINES_MAX " . | grep svggraph
grep -r " LEGEND_COLUMNS_MAX " . | grep svggraph