document cluster verify --no-nsplus1-mem option
document cluster verify --no-nsplus1-mem option

Add this recently added option to the gnt-cluster man page before
releasing 1.2.4.

Reviewed-by: imsnah



apyrgio/snf-ganeti,mbakke/ganeti,apyrgio/ganeti,andir/ganeti,apyrgio/snf-ganeti,grnet/snf-ganeti,leshchevds/ganeti,andir/ganeti,ganeti/ganeti,leshchevds/ganeti,ganeti/ganeti,dimara/ganeti,yiannist/ganeti,ganeti/ganeti,mbakke/ganeti,mbakke/ganeti,bitemyapp/ganeti,yiannist/ganeti,onponomarev/ganeti,ganeti-github-testing/ganeti-test-1,leshchevds/ganeti,apyrgio/ganeti,bitemyapp/ganeti,yiannist/ganeti,andir/ganeti,onponomarev/ganeti,ganeti-github-testing/ganeti-test-1,dimara/ganeti,grnet/snf-ganeti