manager: Fix HTTP connection reference leaks.

Fix reference leak that happens if (session && !blastaway).

ASTERISK-24505 #close
Reported by: Corey Farrell
Review: https://reviewboard.asterisk.org/r/4153/
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Merged revisions 427641 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 427642 from http://svn.asterisk.org/svn/asterisk/branches/12
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Merged revisions 427643 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@427644 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/manager.c

@@ -7515,11 +7515,16 @@ generic_callback_out:
 	ast_free(http_header);
 	ast_free(out);
 
-	if (session && blastaway) {
-		session_destroy(session);
-	} else if (session && session->f) {
-		fclose(session->f);
-		session->f = NULL;
+	if (session) {
+		if (blastaway) {
+			session_destroy(session);
+		} else {
+			if (session->f) {
+				fclose(session->f);
+				session->f = NULL;
+			}
+			unref_mansession(session);
+		}
 	}
 
 	return 0;