v9.1.7

Simple Java Mail 9.1.7 fixes recipient selection in the standalone CLI.

• Restores independent --email:to, --email:cc, and --email:bcc options, allowing one command to combine all three recipient types.
• Retains --email:withRecipients for compatible single-recipient-type commands.
• Leaves the public Java builder API unchanged.

Versions 9.0.0 through 9.1.6 cannot combine TO, CC, and BCC this way because repeated --email:withRecipients options are merged into one invalid invocation. CLI users who need multiple recipient types should upgrade to 9.1.7 or later.

See #682.