Merge branch 'jk/reduce-gc-aggressive-depth'

"git gc --aggressive" used to limit the delta-chain length to 250,
which is way too deep for gaining additional space savings and is
detrimental for runtime performance.  The limit has been reduced to
50.

* jk/reduce-gc-aggressive-depth:
  gc: default aggressive depth to 50

Documentation/config.txt

@@ -1366,7 +1366,7 @@ fsck.skipList::
 gc.aggressiveDepth::
 	The depth parameter used in the delta compression
 	algorithm used by 'git gc --aggressive'.  This defaults
-	to 250.
+	to 50.
 
 gc.aggressiveWindow::
 	The window size parameter used in the delta compression

builtin/gc.c

@@ -28,7 +28,7 @@ static const char * const builtin_gc_usage[] = {
 
 static int pack_refs = 1;
 static int prune_reflogs = 1;
-static int aggressive_depth = 250;
+static int aggressive_depth = 50;
 static int aggressive_window = 250;
 static int gc_auto_threshold = 6700;
 static int gc_auto_pack_limit = 50;