formatting tweaks and constification

cdr/cdr_adaptive_odbc.c

cdr/cdr_csv.c

cdr/cdr_custom.c

cdr/cdr_manager.c

cdr/cdr_odbc.c

cdr/cdr_pgsql.c

cdr/cdr_radius.c

cdr/cdr_sqlite.c

cdr/cdr_sqlite3_custom.c

cdr/cdr_syslog.c

cdr/cdr_tds.c