Use Scrypt as default authentication method

Use --auth-scrypt as default authentication option. No need to specify this option.

• Display authentication options one time in help documentation.

changed title from Use --auth-scrypt as default authentication metho to Use --auth-scrypt as default authentication option

changed the description

mentioned in commit 40a2f13b

closed

changed title from Use --auth-scrypt as default authentication option to Use Scrypt as default authentication option

changed title from Use Scrypt as default authentication option to Use Scrypt as default authentication method