Corrected blatant falsehood in monitoring 101. Anyone who has run
`service nagios reload` can confirm that hosts can be added to Nagios
without a restart.
Merge branch 'monitoring101-correction' of https://github.com/chriscowley/curriculum into chriscowley-monitoring101-correction
reword sentence based on suggestion from @gpapilion
Merge branch 'chriscowley-monitoring101-correction'