log: Change time format

[chfast]

• Keep the tailing zeros.
• Limit precision to milliseconds.

Before:

INFO [06-22|10:37:33.009517] Imported new chain segment               blocks=22 txs=2803 mgas=161.955 elapsed=8.072s mgasps=20.062 number=5827911 hash=91cda6…962f91 cache=536.00mB
INFO [06-22|10:37:42.816757] Imported new chain segment               blocks=27 txs=3738 mgas=176.348 elapsed=9.807s mgasps=17.981 number=5827938 hash=b3336a…0db6ad cache=535.73mB
INFO [06-22|10:37:50.861573] Imported new chain segment               blocks=25 txs=3327 mgas=186.146 elapsed=8.044s mgasps=23.139 number=5827963 hash=665eb7…8521bf cache=535.55mB
INFO [06-22|10:37:59.14676] Imported new chain segment               blocks=21 txs=2913 mgas=158.204 elapsed=8.285s mgasps=19.095 number=5827984 hash=9f6d57…336535 cache=535.10mB
INFO [06-22|10:38:07.222425] Imported new chain segment               blocks=23 txs=2595 mgas=158.903 elapsed=8.075s mgasps=19.677 number=5828007 hash=939d52…e3cc54 cache=535.32mB
INFO [06-22|10:38:15.403928] Imported new chain segment               blocks=22 txs=2740 mgas=156.162 elapsed=8.181s mgasps=19.087 number=5828029 hash=f421b7…c32587 cache=535.11mB
INFO [06-22|10:38:23.482768] Imported new chain segment               blocks=18 txs=3173 mgas=132.471 elapsed=8.078s mgasps=16.397 number=5828047 hash=bb8e55…9fe23b cache=535.68mB

After:

INFO [06-22|10:48:32.367] Imported new chain segment               blocks=23 txs=3009 mgas=183.650 elapsed=9.494s    mgasps=19.343 number=5829188 hash=7005a6…07fa53 cache=151.08mB
INFO [06-22|10:48:40.662] Imported new chain segment               blocks=27 txs=3269 mgas=213.888 elapsed=8.294s    mgasps=25.785 number=5829215 hash=cd8ae1…b2f414 cache=157.64mB
INFO [06-22|10:48:48.785] Imported new chain segment               blocks=22 txs=2639 mgas=174.119 elapsed=8.123s    mgasps=21.435 number=5829237 hash=d05906…ea88af cache=162.66mB
INFO [06-22|10:48:56.876] Imported new chain segment               blocks=20 txs=2560 mgas=159.542 elapsed=8.091s    mgasps=19.718 number=5829257 hash=a2bbfb…e3ea15 cache=169.24mB
INFO [06-22|10:49:06.050] Imported new chain segment               blocks=23 txs=3177 mgas=168.945 elapsed=9.173s    mgasps=18.416 number=5829280 hash=3fa15c…e71407 cache=171.70mB
INFO [06-22|10:49:14.116] Imported new chain segment               blocks=28 txs=2934 mgas=184.112 elapsed=8.066s    mgasps=22.825 number=5829308 hash=5a8a32…5a12ca cache=173.19mB
INFO [06-22|10:49:22.166] Imported new chain segment               blocks=19 txs=2445 mgas=133.785 elapsed=8.049s    mgasps=16.620 number=5829327 hash=1cf532…05de75 cache=177.54mB
INFO [06-22|10:49:30.472] Imported new chain segment               blocks=20 txs=2383 mgas=149.456 elapsed=8.306s    mgasps=17.993 number=5829347 hash=4cd994…07ea55 cache=181.03mB
INFO [06-22|10:49:39.677] Imported new chain segment               blocks=25 txs=2748 mgas=172.918 elapsed=9.205s    mgasps=18.785 number=5829372 hash=7c96ab…c93c55 cache=184.53mB

[karalabe]

I don't like the space change, it was more readable before. The millisecond fix is a good call!

[karalabe]

LGTM

[chfast]

Removed the space change.