The idea of having a hydra to access frequently used features is certainly nice,
but quite hard to achive when one wants to redefine the hydra every time
`db/frequently-used-features' changes. Regrettably, there are not „ephemeral
hydras“ that are created every time one would like to access it. Therefore, the
shortcuts hydra is removed for now, but may come back again when we have found a
better way to handle its dynamic nature.
RFC documents do not change over time. The custom org mode link handler
`db/org-rfc-open' now makes use of this by downloading RFC documents to
`db/rfc-cache-path' (if defined) and opening the files locally. If
`db/rfc-cache-path' is not defined, the RFC is opened in an external browser as
before.
This allows to keep a selection of used RFC documents locally on the filesystem
for future reference, without the need to retrieve them again from the IETF.
Since this is all org mode related, the handler now also resides in `db-org'
instead of `db-utils'.
