tabletserver: readable error messages
tabletserver: readable error messages

Truncate error messages to 5K, and make unprintable
characters printable.

mapbased/vitess,SDHM/vitess,tinyspeck/vitess,cloudbearings/vitess,michael-berlin/vitess,michael-berlin/vitess,atyenoria/vitess,netroby/vitess,netroby/vitess,fengshao0907/vitess,tirsen/vitess,cgvarela/vitess,cgvarela/vitess,mapbased/vitess,AndyDiamondstein/vitess,dumbunny/vitess,mapbased/vitess,applift/vitess,yangzhongj/vitess,sougou/vitess,tirsen/vitess,mahak/vitess,michael-berlin/vitess,dumbunny/vitess,dumbunny/vitess,kuipertan/vitess,ptomasroos/vitess,dcadevil/vitess,vitessio/vitess,tjyang/vitess,aaijazi/vitess,tirsen/vitess,mlc0202/vitess,yaoshengzhe/vitess,rnavarro/vitess,anusornc/vitess,anusornc/vitess,tirsen/vitess,kuipertan/vitess,mahak/vitess,yangzhongj/vitess,vitessio/vitess,nurblieh/vitess,fengshao0907/vitess,yaoshengzhe/vitess,anusornc/vitess,alainjobart/vitess,alainjobart/vitess,pivanof/vitess,SDHM/vitess,michael-berlin/vitess,dumbunny/vitess,rnavarro/vitess,guokeno0/vitess,erzel/vitess,tirsen/vitess,erzel/vitess,yaoshengzhe/vitess,alainjobart/vitess,michael-berlin/vitess,erzel/vitess,tjyang/vitess,kmiku7/vitess-annotated,mattharden/vitess,cgvarela/vitess,fengshao0907/vitess,cgvarela/vitess,ptomasroos/vitess,pivanof/vitess,aaijazi/vitess,erzel/vitess,cloudbearings/vitess,ptomasroos/vitess,tirsen/vitess,guokeno0/vitess,kmiku7/vitess-annotated,davygeek/vitess,yaoshengzhe/vitess,pivanof/vitess,yangzhongj/vitess,pivanof/vitess,aaijazi/vitess,mapbased/vitess,nurblieh/vitess,michael-berlin/vitess,dumbunny/vitess,vitessio/vitess,SDHM/vitess,kuipertan/vitess,HubSpot/vitess,kuipertan/vitess,guokeno0/vitess,rnavarro/vitess,anusornc/vitess,tjyang/vitess,vitessio/vitess,xgwubin/vitess,kuipertan/vitess,kmiku7/vitess-annotated,AndyDiamondstein/vitess,ptomasroos/vitess,dcadevil/vitess,enisoc/vitess,michael-berlin/vitess,mattharden/vitess,kuipertan/vitess,anusornc/vitess,mattharden/vitess,sougou/vitess,kmiku7/vitess-annotated,vitessio/vitess,fengshao0907/vitess,enisoc/vitess,fengshao0907/vitess,SDHM/vitess,dcadevil/vitess,yaoshengzhe/vitess,davygeek/vitess,alainjobart/vitess,rnavarro/vitess,rnavarro/vitess,yangzhongj/vitess,yangzhongj/vitess,rnavarro/vitess,skyportsystems/vitess,guokeno0/vitess,nurblieh/vitess,yaoshengzhe/vitess,applift/vitess,anusornc/vitess,davygeek/vitess,tjyang/vitess,sougou/vitess,erzel/vitess,nurblieh/vitess,sougou/vitess,cloudbearings/vitess,erzel/vitess,HubSpot/vitess,skyportsystems/vitess,cgvarela/vitess,applift/vitess,davygeek/vitess,kmiku7/vitess-annotated,AndyDiamondstein/vitess,tjyang/vitess,mahak/vitess,mlc0202/vitess,HubSpot/vitess,aaijazi/vitess,nurblieh/vitess,dumbunny/vitess,tinyspeck/vitess,mlc0202/vitess,pivanof/vitess,netroby/vitess,yangzhongj/vitess,SDHM/vitess,AndyDiamondstein/vitess,cgvarela/vitess,applift/vitess,cloudbearings/vitess,atyenoria/vitess,yangzhongj/vitess,dcadevil/vitess,ptomasroos/vitess,mattharden/vitess,mattharden/vitess,ptomasroos/vitess,kmiku7/vitess-annotated,yaoshengzhe/vitess,xgwubin/vitess,erzel/vitess,aaijazi/vitess,AndyDiamondstein/vitess,applift/vitess,alainjobart/vitess,yangzhongj/vitess,AndyDiamondstein/vitess,erzel/vitess,tinyspeck/vitess,xgwubin/vitess,yangzhongj/vitess,nurblieh/vitess,mattharden/vitess,guokeno0/vitess,cgvarela/vitess,fengshao0907/vitess,cloudbearings/vitess,enisoc/vitess,cloudbearings/vitess,alainjobart/vitess,mapbased/vitess,skyportsystems/vitess,HubSpot/vitess,pivanof/vitess,alainjobart/vitess,sougou/vitess,kuipertan/vitess,netroby/vitess,tirsen/vitess,mlc0202/vitess,cgvarela/vitess,applift/vitess,tirsen/vitess,yaoshengzhe/vitess,nurblieh/vitess,guokeno0/vitess,kmiku7/vitess-annotated,skyportsystems/vitess,AndyDiamondstein/vitess,mahak/vitess,michael-berlin/vitess,applift/vitess,cloudbearings/vitess,xgwubin/vitess,kuipertan/vitess,aaijazi/vitess,aaijazi/vitess,SDHM/vitess,sougou/vitess,guokeno0/vitess,netroby/vitess,tjyang/vitess,xgwubin/vitess,tinyspeck/vitess,sougou/vitess,anusornc/vitess,nurblieh/vitess,kmiku7/vitess-annotated,xgwubin/vitess,HubSpot/vitess,skyportsystems/vitess,HubSpot/vitess,vitessio/vitess,xgwubin/vitess,enisoc/vitess,tirsen/vitess,applift/vitess,rnavarro/vitess,aaijazi/vitess,mlc0202/vitess,tjyang/vitess,sougou/vitess,cgvarela/vitess,dcadevil/vitess,mlc0202/vitess,erzel/vitess,mattharden/vitess,cloudbearings/vitess,atyenoria/vitess,davygeek/vitess,mlc0202/vitess,mattharden/vitess,erzel/vitess,vitessio/vitess,netroby/vitess,davygeek/vitess,pivanof/vitess,vitessio/vitess,AndyDiamondstein/vitess,michael-berlin/vitess,xgwubin/vitess,HubSpot/vitess,AndyDiamondstein/vitess,kmiku7/vitess-annotated,anusornc/vitess,kuipertan/vitess,dumbunny/vitess,mapbased/vitess,nurblieh/vitess,rnavarro/vitess,skyportsystems/vitess,netroby/vitess,dumbunny/vitess,mapbased/vitess,aaijazi/vitess,guokeno0/vitess,dcadevil/vitess,mlc0202/vitess,HubSpot/vitess,alainjobart/vitess,mahak/vitess,guokeno0/vitess,anusornc/vitess,applift/vitess,pivanof/vitess,fengshao0907/vitess,SDHM/vitess,netroby/vitess,cloudbearings/vitess,mahak/vitess,xgwubin/vitess,dumbunny/vitess,rnavarro/vitess,tjyang/vitess,mapbased/vitess,dcadevil/vitess,yaoshengzhe/vitess,tinyspeck/vitess,atyenoria/vitess,mahak/vitess,tinyspeck/vitess,netroby/vitess,dumbunny/vitess,SDHM/vitess,mapbased/vitess,enisoc/vitess,mapbased/vitess,ptomasroos/vitess,mlc0202/vitess,mattharden/vitess,mahak/vitess,applift/vitess,ptomasroos/vitess,skyportsystems/vitess,ptomasroos/vitess,atyenoria/vitess,atyenoria/vitess,mattharden/vitess,skyportsystems/vitess,atyenoria/vitess,skyportsystems/vitess,atyenoria/vitess,pivanof/vitess,fengshao0907/vitess,tinyspeck/vitess,SDHM/vitess,atyenoria/vitess,tjyang/vitess,davygeek/vitess,enisoc/vitess,enisoc/vitess,fengshao0907/vitess