cli: Use a nicely configured less for psql paging
cli: Use a nicely configured less for psql paging

psql uses more by default, most distros/people use less. This patch
adds environment variables that configure psql to use less for
paging along with some basic, sane less configuration defaults.

Signed-off-by: Jonathan Rudenberg <3692bfa45759a67d83aedf0045f6cb635a966abf@titanous.com>

supermario/flynn,philiplb/flynn,lmars/flynn,josephglanville/flynn,schatt/flynn,schatt/flynn,felixrieseberg/flynn,clifff/flynn,kgrz/flynn,arekkas/flynn,jzila/flynn,tonicbupt/flynn,ozum/flynn,pkdevbox/flynn,rikur/flynn,jzila/flynn,flynn/flynn,philiplb/flynn,schatt/flynn,flynn/flynn,Brandywine2161/flynn,flynn/flynn,tonicbupt/flynn,ozum/flynn,whouses/flynn,TribeMedia/flynn,lmars/flynn,whouses/flynn,pkdevbox/flynn,whouses/flynn,benbjohnson/flynn,felixrieseberg/flynn,lmars/flynn,arekkas/flynn,technosophos/flynn,josephglanville/flynn,lmars/flynn,josephglanville/flynn,benbjohnson/flynn,arekkas/flynn,ozum/flynn,shads196770/flynn,benbjohnson/flynn,clifff/flynn,clifff/flynn,pkdevbox/flynn,flynn/flynn,ozum/flynn,felixrieseberg/flynn,schatt/flynn,clifff/flynn,jzila/flynn,josephglanville/flynn,ozum/flynn,GrimDerp/flynn,benbjohnson/flynn,felixrieseberg/flynn,rikur/flynn,supermario/flynn,pkdevbox/flynn,lmars/flynn,GrimDerp/flynn,Brandywine2161/flynn,arekkas/flynn,technosophos/flynn,GrimDerp/flynn,supermario/flynn,benbjohnson/flynn,ozum/flynn,Brandywine2161/flynn,rikur/flynn,Brandywine2161/flynn,kgrz/flynn,josephglanville/flynn,TribeMedia/flynn,flynn/flynn,justintung/flynn,josephglanville/flynn,shads196770/flynn,justintung/flynn,benbjohnson/flynn,GrimDerp/flynn,technosophos/flynn,clifff/flynn,schatt/flynn,kgrz/flynn,tonicbupt/flynn,supermario/flynn,arekkas/flynn,schatt/flynn,justintung/flynn,rikur/flynn,pkdevbox/flynn,supermario/flynn,kgrz/flynn,technosophos/flynn,justintung/flynn,jzila/flynn,philiplb/flynn,kgrz/flynn,whouses/flynn,TribeMedia/flynn,kgrz/flynn,philiplb/flynn,technosophos/flynn,TribeMedia/flynn,GrimDerp/flynn,TribeMedia/flynn,Brandywine2161/flynn,pkdevbox/flynn,shads196770/flynn,philiplb/flynn,shads196770/flynn,shads196770/flynn,shads196770/flynn,justintung/flynn,GrimDerp/flynn,rikur/flynn,tonicbupt/flynn,jzila/flynn,tonicbupt/flynn,clifff/flynn,jzila/flynn,Brandywine2161/flynn,whouses/flynn,felixrieseberg/flynn,rikur/flynn,justintung/flynn,supermario/flynn,whouses/flynn,TribeMedia/flynn