Merge: use NoError RCode instead of NXDomain to block AAAA requests

* commit '10c9dc8364ef93a33b6ecac85819ce314518d86e':
  * mobile: get rid of useless flag
  + main, README: add handler for disabled AAAA requests; fix readme
  + mobile: add filtering logic for disabled AAAA requests
  * proxy: remove filtering logic from proxy; add helper functions

Merge: add disable ipv6 function

* commit '32b709834a5c5de96df03e6136a5d20b7a443ee7':
  * mobile, proxy, main, README: zero IPv6 -> NXDomain
  * mobile: Fix tests
  * proxy: return NXDomain instead of Zero IPv6
  * mobile, proxy, README: fix comments
  * main, README: Add command-line flags
  * mobile: Add IPv6Disabled to Config; Add tests
  + proxy: Add ability to block all ipv6 requests

Merge: * golibs v0.2.4

* commit 'c0e0065c62e36a0a0482acca276f06a13aca4ced':
  * golibs v0.2.4

feat: 🎸 Upd dependencies

Merge: - DoH: close connection after an error

* commit 'f7177e3f8ea42cfcacd5a38d50459ae96e59a8ab':
  - DoH: close connection after an error

Merge: fix: 🐛 DOH client warmup timeout

* commit '5b2e19a37946762c0253be49c067037cc2273e3a':
  fix: 🐛 fix infinite timeout
  fix: 🐛 DOH client warmup timeout

Merge: - mobile: fix Mozilla DoH check

* commit '3352cccb79b07086c35bd1d8175a834e5ac800e1':
  - mobile: fix Mozilla DoH check

Merge: fix build; small improvements

* commit '2a54ed80cafa18b546a1157dfb0a3c0ebbeb89ce':
  go mod vendor
  * use golibs v0.2.1
  * proxy: cache: don't use gob
  go mod vendor

Merge: * proxy, mobile: use cache size in bytes

* commit 'addd58f14f9c7af5795dc8edcf1f82a1dfb8e78e':
  * proxy, mobile: use cache size in bytes
  * use golibs v0.2.0

Merge: - mobile: don't use filteringEngine object after it's closed

* commit '435c360d830af902d9f04ba3c727e1f2ac702b45':
  - mobile: don't use filteringEngine object after it's closed