Fix New Relic transaction naming.
Fix New Relic transaction naming.

Previously, New Relic would insert asterisks into the transaction names.

For example, a request for "/weather.txt" would be named "/*.txt"
instead of correctly being named "/weather".

The key fix here is using a string variable instead of concatenating a
string in the newrelic_name_transaction() parameters.

carlbennett/carlbennett-api,carlbennett/carlbennett-api