the quiet mode doesn't print neither intro messages nor prompt
in the interactive mode, which makes it useful for scripted usage

this is not going to be backwards compatible change, but it will be the first tagged libknot release sufficient for resolver

* PIE,RELRO+NOW and other security features enabled
* support for both static/dynamic builds with BUILDMODE
* dynamic library is ABI-versioned, starting at 1
* pkg-config file is installed

this is needed to make sure it always compiles with PIC

if the root key file doesn’t exist, it will be populated from root DNSKEY query, which will be validated against root trust anchors retrieved over HTTPS with IANA cert verification against built-in current IANA cert CA. it requires luasocket and luasec for it to work. trust anchors XML file signature is not checked, as there’s no facility for PKCS7 checking yet.

amalgamated build concatenates all files into a single .c file to
allow compiler see all symbols and produce possibly smaller code.
for binary distributions this is what you want, as it's faster but
may consume more memory during compilation.
it however cannot do incremental builds.

example:
$ kdig @a.root-servers.net +short +tcp DNSKEY . > root.key
$ kresd -k root.key

`kresd -a 127.0.0.1 -a ::1` binds to both addresses

the reason is that it's not actively used since we moved to binary
testing, and it depends on libknot internal api that has changed
also removed several unused libknot internal headers

previously, debug messages were optional with -DWITH_DEBUG
now the debug messages are built in (unless compiled with -DNDEBUG), but
disabled by default

verbose output can be enabled by '-v' or '--verbose' CLI option
or interactively by 'verbose(true|false)' (or in config)

fixes killing the server with SIGKILL causing abortiong,
added SIGTERM handler and ignored retcode from uv_run()

this is a first step of leaning towards LuaJIT.
the FFI bindings are much faster, simpler and don’t abort traces

daemon core scripting engine is still going to support interpreted Lua, but modules requiring library bindings (such as ‘block’) will require LuaJIT for FFI

fixed CID#125374

this fixes an issue with libuv sometimes crashing with mismatching number
of descriptors with REUSEPORT

when the daemon starts in non-interactive mode, it creates a pipe in the ‘tty/<pid>’ which can be used to interact with it remotely - much wow

e.g. $ socat - UNIX-CONNECT:tty/38284

this LRU-like cache tracks lame nameservers, unresolvable
nameservers (to not waste resources in trying to resolve them),
and possibly other features (extension support, …)

This reverts commit 91a2945e.

Conflicts:
	daemon/worker.h

this avoids repetitive allocation/free cycles on load