TracIni macro should have a way to specify exact section and option names to render

[Jun Omae]

[[TracIni(notification)]] and [[TracIni(notification-subscriber)]] are used in TracNotification page. However, [notification-subscriber] section is rendered twice.

It is caused by [[TracIni(notification)]] rendering both notification and notification-subscriber sections. I think it is intend to render only notification section.

Then, the macro should have a way to specify exact section and option names to render, e.g.:

• [[TracIni(section=notification)]]: render notification section
• [[TracIni(section=notification-*)]]: render sections matched notification-* pattern
• [[TracIni(option=smtp_enabled)]]: render smtp_enabled options in any sections
• [[TracIni(option=smtp_*)]]: render options matched smtp_* pattern in any sections
• [[TracIni(section=notification,option=mime_encoding)]]: render [notification] mime_encoding