fix nvrtc deadlock with `cuda version != 10.1`: https://github.com/xmrig/xmrig-nvidia/issues/260

Since the dev pool is sometimes using another POW than the user pool the
hash date can strongly increase or decrease.
In a case of a hash rate drop a monitoring software could trigger a
wrong miner restart.

- use the hash rate calculated during the user pool mining to
interpulate the number of hashes during the dev pool mining so that the
statistics stay constant.

Simple starts requires always user interactions if config.txt and
pools.txt is not available.
This PR asked the user only on the first advanced option if he/she
preferse the simple start or an advanced mode.
If all parameter are already defined via command line options than the
question will never be shown.

- add .clang-format from RYO

This PR removes the space indention by tabs.

Add the possibility to run a simplified miner configuration.
IN the case the user like to use this mode the number of question to
setup the miner will be reduced to a minimum.

Additional changes:
- add default values for `yes/no` questions

Instead of creating a new kernel for each block we pre-build 25 kernel within a chunk.
This reduces the calls to `clCreateProgramWithSource` which creates the leaks and will crash the miner after a few hours.

Workaround was first introduced by @SChernykh in xmrig-amd

add option to control where the amd cache data should be stored

Fix a memory leak that the OpenCL programs was not freed correctly.
First solved by @xmrig

Add support for non media ops for cryptonight_r

If cryptonight_gpu is used in the dev pool and a cryptonight_v8 derived
algorithm than cryptonight_gpu will create wrong results if v8 was
running as non ASM version.

Add new algorithm alias for cryptonight_v8_double. The difference to v8
is that the number of iterations is increased.

Add also the currency X-CASH which use cryptonight_double.

If the miner changed the pool (user pool or dev pool) and the network
block of monero has not changed the miner switch to the non asm version.

Add check if the hash function has changed. If the hash function not
point to the asm version the ASM function is recreated.

The OS is able to disable avx. In that case our avx detection is wrong.
See xmrig issue: https://github.com/xmrig/xmrig/issues/951

Import fix: https://github.com/xmrig/xmrig/commit/6052da3c4399514c95245b2d342f04baa20958db#diff-92fa29935c136762d35981769ac79f52

thx @xmrig for the notification.

Remove fork description for monero.

The original implementation of the cache release and create always new
kernel, this can lead into performance issues and my crashes.

add support for cnR double thread assembler

Since masari increased the block size the miner crashed each time it
gets connected with a masari pool.

This PR extent the possible size of a block to 128 byte and updated the
kernel.

Fix again issues with vega and vii with the latest windows driver.

activate nicehash

rebased version of #2261

Added support of CryptoNight v8 Reverse Waltz (named cryptonight_v8_reversewaltz here) - equal to CryptoNight v8 but with 3/4 iterations of CryptoNight v8 and with reversed shuffle operation

We plan to use CryptoNight v8 Reverse Waltz as new PoW algorithm for Graft (graft-project/GraftNetwork#234).

- fix linker issues with CUDA8
- fix device selection

- add cryptonight_r assembly
- fix cryptobight_v8 assembly

fix #2276

Since #2268 the multi gpu support is broken. It is not possible to have more than one opencl context in a process.
Use one OpenCl context for the process instead per GPU.

- update coin definitions
- set rounding mode for cn_gpu
- remove currency cryptonight_wow (currently untested)

Co-authored-by: psychocrypt <psychocryptHPC@gmail.com>
Co-authored-by: fireice-uk <fireice-uk@users.noreply.github.com>

implementation is derived from the reverence implementation in xmrig

implementation is derived from the reverence implementation in xmrig

Co-authored-by: psychocrypt <psychocryptHPC@gmail.com>
Co-authored-by: fireice-uk <fireice-uk@users.noreply.github.com>

implementation is derived from the reverence implementation in xmrig

Set default verbose to 4

users are used to seing hashrate by default. Set it to 30 sec.
edit config.tpl typos

- set log lvl 4 as default
- increase the hashrate report time from 1min to 5min

- remove fork for Ryo from cn_heavy to cn_gpu (now always cn_gpu)
- add example pool for ryo