How many poller cycles must be down before it will send an alert. After an alert is sent, in order for a 'Site Recovering' Email to be send, it must also be up this number of poller cycles.
An option passed to libcurl is not recognized/known. Refer to the appropriate documentation. This is most likely a problem in the program that uses libcurl. The error buffer might contain more specific information about which exact option it concerns.