* Make DNS resolution order selectable during runtime or compile time (only in dual stack mode).
* Extend IPv6 example to show usage of new hostByName function with selectable resolving order
* Fix function definition of fqdn_rt in IPv6.ino.
* Fix function call.
* Fix missing bracket...
* Only run if built with dual stack support
* Make DNS resolution order selectable during runtime or compile time (only in dual stack mode).
* Extend IPv6 example to show usage of new hostByName function with selectable resolving order
* Fix function definition of fqdn_rt in IPv6 example.
* Implement enum class for resolve type
* Fix example IPv6.ino
* Fix typedef in ESP8266WiFiGeneric.h function call
* Change enum class definition to not depend on lwip/dns.h
* Move err_t err definition outside switch. Fix typecast.
* Always define DNSResolveType as pio test otherwise failes even if the enum class isn't used.
Co-authored-by: altelch <heiko.krupp@rhrk.uni-kl.de>
Co-authored-by: david gauchard <gauchard@laas.fr>
* polledTimeout: add option to use CPU count instead of millis()
* use more "using" alias
* more c++/clear code, using typename (thanks @devyte)
* rename class name to include unit, introduce timeMax() and check it with assert()
* remove useless defines
* improve api readability, add micro-second unit
* update example
* mock: emulate getCycleCount, add/fix polledTimeout CI test
* + nano-seconds, assert -> message, comments, host test
* allow 0 for timeout (enables immediate timeout, fix division by 0)
* typo, set member instead of local variable
* unify error message
* slight change on checkExpired() allows "never expired"
also removed printed message, add YieldAndDelay, simplify calculations
* remove traces of debug.h/cpp in this PR
* include missing <limits> header
* back to original expired test, introduce boolean _neverExpires, fix reset(), getTimeout() is invalid
* fix expiredOneShot with _timeout==0 check
* reenable getTimeout()
* expose checkExpired with unit conversion
* fix timing comments, move critical code to iram
* add member ::neverExpires and use it where relevant
* improve clarity
* remove exposed checkExpired(), adapt LEAmDNS with equivalent
* add API ::resetToNeverExpires(), use it in LEAmDNS
* remove offending constness from ::flagged() LEAmDNS (due do API fix in PolledTimeout)
* simplify "Fast" base classes
* minor variable rename
* Fix examples
* compliance with good c++ manners
* minor changes for consistency
* add missing const
* expired() and bool() moved to iram
* constexpr compensation computing
* add/update comments
* move neverExpires and alwaysExpired
