Update AlertManager SMTP TLS configuration options
Update AlertManager SMTP TLS configuration options

Cepave/openfalcon.io,chosenken/docs,du2016/prometheus-docs,ddfreyne/prometheus-docs,prometheus/docs,du2016/prometheus-docs,prometheus/docs,open-falcon/open-falcon.github.io,ddfreyne/prometheus-docs,chosenken/docs,ddfreyne/prometheus-docs,chosenken/docs,open-falcon/open-falcon.github.io,ddfreyne/prometheus-docs,du2016/prometheus-docs,prometheus/docs,Cepave/openfalcon.io,chosenken/docs,Cepave/openfalcon.io,open-falcon/open-falcon.github.io