This required couple of internal changes to the isc_mem_debugging.
The isc_mem_debugging is now internal to isc_mem unit and there are
three new functions:
1. isc_mem_setdebugging() can change the debugging setting for an
individual memory context. This is need for the memory contexts used
for OpenSSL, libxml and libuv accounting as recording and tracing
memory is broken there.
2. isc_mem_debugon() / isc_mem_debugoff() can be used to change default
memory debugging flags as well as debugging flags for isc_g_mctx.
Additionally, the memory debugging is inconsistent across the code-base.
For now, we are keeping the existing flags, but three new environment
variables have been added 'ISC_MEM_DEBUGRECORD', 'ISC_MEM_DEBUGTRACE'
and 'ISC_MEM_DEBUGUSAGE' to set the global debugging flags at any
program using the memory contexts.
Instead of giving the memory context names with an explicit call to
isc_mem_setname(), add the name to isc_mem_create() call to have all the
memory contexts an unconditional name.
Since algorithm fetching is handled purely in libisc, FIPS mode toggling
can be purely done in within the library instead of provider fetching in
the binary for OpenSSL >=3.0.
Disabling FIPS mode isn't a realistic requirement and isn't done
anywhere in the codebase. Make the FIPS mode toggle enable-only to
reflect the situation.
The libisc now includes sizeable chunks of cryptography, but the crypto
log module was missing. Add the new ISC_LOGMODULE_CRYPTO to libisc and
use it in the isc_tls error logging.
Unify libcrypto initialization and explicit digest fetching in a single
place and move relevant code to the isc__crypto namespace instead of
isc__tls.
It will remove the remaining implicit fetching and deduplicate explicit
fetching inside the codebase.
