config: fix profile port arg parsing

In this commit, we fix a subtle bug in the parsing of the yaml config.
With the way the library works, the attribute name needs to match the
config attribute name. Otherwise, parsing just doesn't work.

aperture.go

@@ -201,8 +201,8 @@ func (a *Aperture) Start(errChan chan error) error {
 	}
 
 	// Enable http profiling and validate profile port number if requested.
-	if a.cfg.ProfilePort != 0 {
-		if a.cfg.ProfilePort < 1024 || a.cfg.ProfilePort > 65535 {
+	if a.cfg.Profile != 0 {
+		if a.cfg.Profile < 1024 || a.cfg.Profile > 65535 {
 			return fmt.Errorf("the profile port must be between " +
 				"1024 and 65535")
 		}
@@ -212,9 +212,7 @@ func (a *Aperture) Start(errChan chan error) error {
 				"/debug/pprof", http.StatusSeeOther,
 			))
 
-			listenAddr := fmt.Sprintf(
-				"localhost:%d", a.cfg.ProfilePort,
-			)
+			listenAddr := fmt.Sprintf("localhost:%d", a.cfg.Profile)
 
 			log.Infof("Starting profile server at %s", listenAddr)
 			fmt.Println(http.ListenAndServe(listenAddr, nil))

config.go

@@ -200,8 +200,8 @@ type Config struct {
 	// BaseDir is a custom directory to store all aperture flies.
 	BaseDir string `long:"basedir" description:"Directory to place all of aperture's files in."`
 
-	// ProfilePort is the port on which the pprof profile will be served.
-	ProfilePort uint16 `long:"profile" description:"Enable HTTP profiling on given port -- NOTE port must be between 1024 and 65535"`
+	// Profile is the port on which the pprof profile will be served.
+	Profile uint16 `long:"profile" description:"Enable HTTP profiling on given port -- NOTE port must be between 1024 and 65535"`
 }
 
 func (c *Config) validate() error {