The changes made in this file are detailed in release/3.5 commits
295c8f7d37 through 265dc4e53c inclusive.
Some slight alterations are necessary; librb instead of libratbox,
snprintf() instead of rb_snprintf(), etc. Also, release/4 has
offline certificate digesting functionality. For more insight,
simply diff the mbedtls.c between release/3.5 and release/4.
* Move certificate, key, DH parameters and configuration to heap
(Documentation states that setting new configuration, e.g.
during a rehash, is unsupported while connections using that
configuration are active)
This is the same approach as the fix for #186
Refcount these structures so as to not introduce a memory leak
On rehash, it will use new structures only if there are no
errors in constructing them
* Make fingerprint generation work for TLS connections
See the comments in the newly created file for an explanation
* Fix memory leak when generating a fingerprint from a file
* Add better error-reporting (strings in addition to numbers)
where possible
* Coalesce several connection memory allocations into one function
* Reduce boilerplate where possible (Charybdis targets C99)
* Support private key being in certificate file, and having no
DH parameters file
* Correct erroneous closing comment
