Rename --os-info option into --sysinfo and add --no-sysinfo option to completly disable the generation of sysinfo.txt
Generation of database related reports (cluster, database, pgbouncer) have been review to use non global filehandle. It will not search for pg_database_size.csv anymore to contruct the list of database and prevent case where some reports was genereted twice. Speed improvement.
It will not search for pg_database_size.csv anymore to contruct the list of database and read pgbouncer file to get list of database with pgbouncer.