Greedy ioloop working

[vEpiphyte]

• Re-enable the SYN_GREEDY_CORO flag
• Set the ioloop into debug mode when this is enabled

This should be considered for use in development/debugging, not for general production use.

[codecov]

Codecov Report

Merging #1870 into master will decrease coverage by 2.85%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1870      +/-   ##
==========================================
- Coverage   96.58%   93.73%   -2.86%     
==========================================
  Files         141      141              
  Lines       27626    27629       +3     
==========================================
- Hits        26683    25897     -786     
- Misses        943     1732     +789     

Flag	Coverage Δ
#linux	93.73% <100.00%> (-2.86%)	⬇️
#linux_replay	66.68% <100.00%> (+7.65%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
synapse/glob.py	100.00% <100.00%> (+2.77%)	⬆️
synapse/lib/crypto/ecc.py	0.00% <0.00%> (-100.00%)	⬇️
synapse/lib/crypto/tinfoil.py	0.00% <0.00%> (-100.00%)	⬇️
synapse/cmds/cron.py	10.37% <0.00%> (-87.17%)	⬇️
synapse/cmds/boss.py	23.72% <0.00%> (-76.28%)	⬇️
synapse/axon.py	74.12% <0.00%> (-25.00%)	⬇️
synapse/lib/dyndeps.py	67.44% <0.00%> (-23.26%)	⬇️
synapse/models/files.py	78.57% <0.00%> (-20.54%)	⬇️
synapse/lib/certdir.py	80.39% <0.00%> (-17.90%)	⬇️
synapse/lib/output.py	80.00% <0.00%> (-16.67%)	⬇️
... and 11 more

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