De-duplicate __FILE__, __LINE__

Mostly generated automatically with the following semantic patch,
except where coccinelle was confused by #ifdef in lib/isc/net.c

@@ expression list args; @@
- UNEXPECTED_ERROR(__FILE__, __LINE__, args)
+ UNEXPECTED_ERROR(args)
@@ expression list args; @@
- FATAL_ERROR(__FILE__, __LINE__, args)
+ FATAL_ERROR(args)

(cherry picked from commit ec50c58f52)

doc/dev/unexpected

@@ -37,8 +37,7 @@ not, we call UNEXPECTED_ERROR().  E.g.
 
 void foo() {
 	if (some_unix_thang() < 0) {
-		UNEXPECTED_ERROR(__FILE__, __LINE__,
-				 "some_unix_thang() failed: %s",
+		UNEXPECTED_ERROR("some_unix_thang() failed: %s",
 				 strerror(errno));
 		return (ISC_R_UNEXPECTED);
 	}