Debug build, memory as reported by `pmap`. 32bit x86.

97276 startup
101952K dovecot (26040 msgs)
104724K qt-interest (18467 msgs)
114332K gentoo-dev (39857 msgs)

114628K after loading one plaintext message

= 84364 msgs in total, 3 parsers, grew 17MB

114760K INBOX (6056 msgs)
