email: Increase the size of the message to 100MiB

• This includes the envelope size, so the actual size of the message and attachments is somewhat lower.

Tests:

• Install the app freshly with the patch. Notice that message_size_limit is set to 102400000 by running 'postconf message_size_limit'.

• Install the app without the patch. Apply patche and notice that the app is updated. Notice that message_size_limit is set to 102400000 by running 'postconf message_size_limit'.

Signed-off-by: Sunil Mohan Adapa sunil@medhas.org