fast-import: increase the default pack depth to 50

In 618e613, 10 years ago, the default for pack depth used for
git-pack-objects and git-repack was changed from 10 to 50, while
leaving fast-import's default to 10.

There doesn't seem to be a reason besides oversight for the change not
having happened in fast-import as well.

Interestingly, fast-import uses pack.depth when it's set, and the
git-config manual says the default for pack.depth is 50. While the
git-fast-import manual does say the default depth is 10, the
inconsistency is also confusing.

Signed-off-by: Mike Hommey <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: glandium

Documentation/git-fast-import.txt

@@ -121,7 +121,7 @@ Performance and Compression Tuning
 
 --depth=<n>::
 	Maximum delta depth, for blob and tree deltification.
-	Default is 10.
+	Default is 50.
 
 --export-pack-edges=<file>::
 	After creating a packfile, print a line of data to

fast-import.c

@@ -280,7 +280,7 @@ struct recent_command {
 };
 
 /* Configured limits on output */
-static unsigned long max_depth = 10;
+static unsigned long max_depth = 50;
 static off_t max_packsize;
 static int unpack_limit = 100;
 static int force_update;