Pool need money + min_fee
I'm running monero-pool (testnet) with `self-select`, and using your version of xmrig to mine.

It looks like `"autosave": true` in `config.json` make xmrig overwrite/delete `"self-select": "localhost:28081"`

After mining quite a few blocks, I get the folowing on the screen:
```
2019-07-11 17:11:56.112     W Received money: 5.849361442658, with tx: <bb94ba724f0c8275b10bfd60d327171cc0d859ae72af72908bcf1124b94a4340>
2019-07-11 17:16:36.590  W Received money: 5.849327972407, with tx: <e793a8dbf55a9a495f0683bff460668e3c7fc89bdeb65984cf21b20ed1904e4e>
2019-07-11 17:17:34.862  W amount=5.850064362168, real_output=10, real_output_in_tx_index=0, indexes: 454820 497714 545135 546466 551740 554012 554582 554793 554799 555037 555221 
2019-07-11 17:17:34.862  W amount=5.850008571819, real_output=10, real_output_in_tx_index=0, indexes: 464904 507589 532583 537926 551396 552263 553770 554226 554478 554977 555226 
2019-07-11 17:17:34.862  W amount=5.849986255829, real_output=10, real_output_in_tx_index=0, indexes: 532156 549758 553175 553222 553331 553338 554585 554618 554964 555202 555228 
2019-07-11 17:17:34.895  W amount=5.850064362168, real_output=10, real_output_in_tx_index=0, indexes: 454820 497714 545135 546466 551740 554012 554582 554793 554799 555037 555221 
2019-07-11 17:17:34.895  W amount=5.850008571819, real_output=10, real_output_in_tx_index=0, indexes: 464904 507589 532583 537926 551396 552263 553770 554226 554478 554977 555226 
2019-07-11 17:17:34.895  W amount=5.849986255829, real_output=10, real_output_in_tx_index=0, indexes: 532156 549758 553175 553222 553331 553338 554585 554618 554964 555202 555228 
2019-07-11 17:17:34.945  W amount=5.850064362168, real_output=10, real_output_in_tx_index=0, indexes: 454820 497714 545135 546466 551740 554012 554582 554793 554799 555037 555221 
2019-07-11 17:17:34.945  W amount=5.850008571819, real_output=10, real_output_in_tx_index=0, indexes: 464904 507589 532583 537926 551396 552263 553770 554226 554478 554977 555226 
2019-07-11 17:17:34.945  W amount=5.849986255829, real_output=10, real_output_in_tx_index=0, indexes: 532156 549758 553175 553222 553331 553338 554585 554618 554964 555202 555228 
2019-07-11 17:17:35.331  W Received money: 5.849316815700, with tx: <ba529e20c83184c9ba843ab2375548c9ab611b553e715a76077a5c2959c51ff3>
2019-07-11 17:18:15.395  W Received money: 4.019315284214, with tx: <23cef739d0d14e559a280e43f75e705c1e038af3486cff445c0bdfa5574820e0>
2019-07-11 17:18:15.395  W Spent money: 5.850008571819, with tx: <23cef739d0d14e559a280e43f75e705c1e038af3486cff445c0bdfa5574820e0>
2019-07-11 17:18:15.395  W Spent money: 5.850064362168, with tx: <23cef739d0d14e559a280e43f75e705c1e038af3486cff445c0bdfa5574820e0>
2019-07-11 17:18:15.395  W Spent money: 5.849986255829, with tx: <23cef739d0d14e559a280e43f75e705c1e038af3486cff445c0bdfa5574820e0>
2019-07-11 17:26:16.375  W Received money: 5.849216406288, with tx: <64b97229063f64c7ea466591babff7589264c11a92d64100ff84b10f4e334ae9>
2019-07-11 17:27:05.985  E needed_money + min_fee > unlocked_balance_subtotal. THROW EXCEPTION: error::not_enough_unlocked_money
2019-07-11 17:28:56.715  W Received money: 5.849194093319, with tx: <fc1e818c1c9f44c79961c9704ef3c49e22d41d9f15deaa0383d5e3d903827c78>
2019-07-11 17:32:57.261  W Received money: 5.849182936867, with tx: <547d1d887ae281a645a1cde12eab185996ceb44a0d80a3faa379de0b982b77e2>
2019-07-11 17:33:37.337  W Received money: 5.849160624026, with tx: <dc87b8f18b9031548b4f2e52c2ea83ea19bbcc506bae39ec9d8914e9487e2aaf>
2019-07-11 17:34:37.431  W Received money: 5.849149467638, with tx: <c819d4babfd668498463409cfcc233db4d31467669b13604fa186d797249720a>
2019-07-11 17:35:17.527  W Received money: 5.849127154924, with tx: <a85baa018d85da1bc131ff030d2fae914049bd55c16a1a186349ec66bab32416>
2019-07-11 17:37:05.991  E needed_money + min_fee > unlocked_balance_subtotal. THROW EXCEPTION: error::not_enough_unlocked_money
2019-07-11 17:37:17.766  W Received money: 5.849104842296, with tx: <537b6140261e4377cfa8c9ef27cdf0dfd47eb231d1c360c149bc410425f79321>
2019-07-11 17:37:37.795  W Received money: 5.849093686014, with tx: <74c6fd02a8cefa27f82f58dcaeb97c07967bdf112e816a5d9bc9fb1f0d5b0fbc>
2019-07-11 17:39:18.098  W Received money: 5.849082529753, with tx: <e634d5786adc068f5ec47d66591abd472e1fb3a5a222325217584c88d1af996d>
```
This is because those blocks are waiting to validate, right?

I can't see if anything gets to the `miner wallet` because of:
```
[wallet 9zwQfv]: balance        
Currently selected account: [0] Primary account
Tag: (No tag assigned)
Balance: 0.000000000000, unlocked balance: 0.000000000000
Password needed (output received) - use the refresh command
Password needed (output received) - use the refresh command
Password needed (output received) - use the refresh command
Password needed (output received) - use the refresh command
[wallet 9zwQfv]: refresh        
Starting refresh...
Enter password (output received): Enter password (output received): Enter password (output received): Enter password (output received): Error: refresh failed: unexpected error: proxy exception in refresh thread. Blocks received: 0
Password needed (output received) - use the refresh command
Password needed (output received) - use the refresh command
Password needed (output received) - use the refresh command
Password needed (output received) - use the refresh command
```
I'm gonna leave it running overnight, and see how it looks in the morning.

![image](https://user-images.githubusercontent.com/5003891/61073052-c31e9600-a43e-11e9-8977-b6ef3a701ccc.png)
