net/pear-Net_SMTP: 1.6.3 -> 1.7.1

• Fix a syntax error in the quotedata() test.
• Fix an undefined value resulting from a bad merge. (#23)
• Add TLSv1.1 and TLSv1.2 support for STARTTLS connections. (#22)
• Drops PHP 4 support in favor of more modern PHP language constructs.