fix typos, remove duplicated docs and link instead

Signed-off-by: Sandor Szücs <sandor.szuecs@zalando.de>

docs/operation/operation.md

@@ -561,13 +561,14 @@ Skipper has two filters [`lifo()`](../../reference/filters/#lifo) and
 the number of requests for a route.  A [documented load
 test](https://github.com/zalando/skipper/pull/1030#issuecomment-485714338)
 shows the behavior with an enabled `lifo(100,100,"10s")` filter for
-all routes, that was added by default the filter flag:
+all routes, that was added by default. You can do this, if you pass
+the following flag to skipper:
 `-default-filters-prepend=lifo(100,100,"10s")`.
 
 Both LIFO filters will, use a last in first out queue to handle most
 requests fast. If skipper is in an overrun mode, it will serve some
 requests fast and some will timeout. The idea is based on Dropbox
-bandit proxy, which is not opensource. [Dropbox](https://dropbox.com/)
+bandaid proxy, which is not opensource. [Dropbox](https://dropbox.com/)
 shared their idea in a [public
 blogpost](https://blogs.dropbox.com/tech/2018/03/meet-bandaid-the-dropbox-service-proxy/).
 

docs/reference/filters.md

@@ -1400,7 +1400,7 @@ first out queue (LIFO), instead of an unbounded first in first out
 queue (FIFO). The default skipper scheduler is based on Go net/http
 package, which provides an unbounded FIFO request handling. If you
 enable this filter the request scheduling will change to a LIFO.  The
-idea of a LIFO queue is based on Dropbox bandit proxy, which is not
+idea of a LIFO queue is based on Dropbox bandaid proxy, which is not
 opensource. Dropbox shared their idea in a
 [public blogpost](https://blogs.dropbox.com/tech/2018/03/meet-bandaid-the-dropbox-service-proxy/).
 All bounded scheduler filters will respond requests with server status error
@@ -1426,19 +1426,7 @@ to 150 and Timeout to 10 seconds.
 
 ## lifoGroup
 
-Filter changes skipper to handle the route with a bounded last in
-first out queue (LIFO), instead of an unbounded first in first out
-queue (FIFO). The default skipper scheduler is based on Go net/http
-package, which provides an unbounded FIFO request handling. If you
-enable this filter the request scheduling will change to a LIFO.  The
-idea of a LIFO queue is based on Dropbox bandit proxy, which is not
-opensource. Dropbox shared their idea in a
-[public blogpost](https://blogs.dropbox.com/tech/2018/03/meet-bandaid-the-dropbox-service-proxy/).
-All bounded scheduler filters will respond requests with server status error
-codes in case of overrun. All scheduler filters return HTTP status code:
-
-- 502, if the specified timeout is reached, because a request could not be scheduled fast enough
-- 503, if the queue is full
+This filter is similar to the [lifo](#lifo) filter.
 
 Parameters:
 

filters/builtin/redirect.go

@@ -43,7 +43,7 @@ type redirect struct {
 // Name: "redirect".
 //
 // This filter is deprecated, use RedirectTo instead.
-// This deprecated filter can not be used with filters from scheduler package.
+// This *DEPRECATED* filter can not be used with filters from scheduler package.
 func NewRedirect() filters.Spec { return &redirect{typ: redDeprecated} }
 
 // NewRedirectTo returns a new filter Spec, whose instances create an HTTP redirect

filters/scheduler/doc.go

@@ -12,7 +12,7 @@
 // queue, the lifo and lifoGroup filter. Both lifo filters will, use a
 // last in first out queue to handle most requests fast and if skipper
 // is in an overrun mode, it will serve some requests fast and some
-// will timeout. The idea is based on Dropbox bandit proxy, which is
+// will timeout. The idea is based on Dropbox bandaid proxy, which is
 // not opensource. Dropbox shared their idea in a public blogpost
 // https://blogs.dropbox.com/tech/2018/03/meet-bandaid-the-dropbox-service-proxy/.
 // This scheduler implementation makes sure that one route will not

scheduler/scheduler_test.go

@@ -113,9 +113,7 @@ func TestScheduler(t *testing.T) {
 				}
 			}
 
-			// tt.paths
 			stacksMap := make(map[string][]*scheduler.Stack)
-
 			for _, group := range tt.paths {
 				key := group[0]