notmuch 0.17

update the notmuch formula to version 0.17

Closes #25637.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
libbson 0.4.0

Closes #25639.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
formula: fix whitespace.
ENV: add method to prepend and create a PATH.
Pathname: add methods to write env scripts.
caveats: show python caveats if modules installed.
ansible: cleanup python usage.
aubio: cleanup python usage.
beecrypt: cleanup python usage.
binwalk: cleanup python usage.
bulk_extractor: cleanup python usage.
bup: cleanup python usage.
cantera: cleanup python usage.
charm-tools: cleanup python usage.
cmu-sphinxbase: cleanup python usage.
collectd: cleanup python usage.
cookiecutter: cleanup python usage.
cvs2svn: cleanup python usage.
diffuse: cleanup python usage.
disco: cleanup python usage.