rsntp

rsntp is used at run time in 5 crates.

Number of dependers	rsntp version	Downloads/month
3	4.0.0	10K
2	3.0.2	2.7K

Depender (with downloads and own rev deps)			rsntp version
310		RustGLM		^4.0.0
		rsdate		^3.0.1
		mymy		^3.0.2
		iid		^4.0.0
		tsar-sdk		^4