versions: remove FIXME

I understand how this works now, and it is definitely necessary.
couchdb: depend on homebrew/versions/erlang-r15
midgard2: fix configure flag to match libgda version

Fixes #18572.
fits 0.6.2
scons 2.3.0

Closes #18566.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
RethinkDB depends on boost

Closes #18577.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
ffmpeg 1.2

Closes #18574.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
MongoDB 2.4.0

Closes #18562.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
qrencode 3.4.2

Closes #18580.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
cassandra 1.2.3

Closes #18587.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
geoserver 2.3.0

Closes #18586.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
spring-roo 1.2.3

Closes #18585.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
john: jumbo still fails with clang 425

Closes #18582.
vim 7.3.871

Closes #18589.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
vim 7.3.872
sbt --devel 0.13.0-M1

Closes #18584.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
lftp 4.4.5

Closes #18567.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
vim: build without NLS is optional now

Closes #18530.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
dart 20193

Closes #18591.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
mpfr: With clang build 425 it works in superenv

See #15061