about disable ssl cert check / accept low strength certificate encryption

$ curl -h | sed -ne '/--tlsv/p'
 -1, --tlsv1 Use TLSv1.0 or greater
     --tlsv1.0 Use TLSv1.0
     --tlsv1.1 Use TLSv1.1
     --tlsv1.2 Use TLSv1.2
     --tlsv1.3 Use TLSv1.3