bundle2: hide bundle2 stream debug under a config flag

The old output is very verbose and unsuitable for general debug level. It is
however very useful for debugging bundle2 generation or consumption issues. All
this verbose ouput is hidden under a 'devel.bundle2.debug' flag.

mercurial/bundle2.py

@@ -175,11 +175,13 b' preferedchunksize = 4096'
 
 def outdebug(ui, message):
     """debug regarding output stream (bundling)"""
-    ui.debug('bundle2-output: %s\n' % message)
+    if ui.configbool('devel', 'bundle2.debug', False):
+        ui.debug('bundle2-output: %s\n' % message)
 
 def indebug(ui, message):
     """debug on input stream (unbundling)"""
-    ui.debug('bundle2-input: %s\n' % message)
+    if ui.configbool('devel', 'bundle2.debug', False):
+        ui.debug('bundle2-input: %s\n' % message)
 
 def validateparttype(parttype):
     """raise ValueError if a parttype contains invalid character"""

tests/test-bundle2-format.t

@@ -336,7 +336,7 b' Test debug output'
 
 bundling debug
 
-  $ hg bundle2 --debug --param 'e|! 7/=babar%#==tutu' --param simple ../out.hg2 --config progress.debug=true
+  $ hg bundle2 --debug --param 'e|! 7/=babar%#==tutu' --param simple ../out.hg2 --config progress.debug=true --config devel.bundle2.debug=true
   bundle2-output-bundle: "HG20", (2 params) 0 parts total
   bundle2-output: start emission of HG20 stream
   bundle2-output: bundle parameter: e%7C%21%207/=babar%25%23%3D%3Dtutu simple
@@ -350,7 +350,7 b' file content is ok'
 
 unbundling debug
 
-  $ hg statbundle2 --debug --config progress.debug=true < ../out.hg2
+  $ hg statbundle2 --debug --config progress.debug=true --config devel.bundle2.debug=true < ../out.hg2
   bundle2-input: start processing of HG20 stream
   bundle2-input: reading bundle2 stream parameters
   bundle2-input: ignoring unknown parameter 'e|! 7/'
@@ -384,7 +384,7 b' bad parameter name'
 Test part
 =================
 
-  $ hg bundle2 --parts ../parts.hg2 --debug --config progress.debug=true
+  $ hg bundle2 --parts ../parts.hg2 --debug --config progress.debug=true --config devel.bundle2.debug=true
   bundle2-output-bundle: "HG20", 7 parts total
   bundle2-output: start emission of HG20 stream
   bundle2-output: bundle parameter: 
@@ -468,7 +468,7 b' Test part'
       payload: 0 bytes
   parts count:   7
 
-  $ hg statbundle2 --debug --config progress.debug=true < ../parts.hg2
+  $ hg statbundle2 --debug --config progress.debug=true --config devel.bundle2.debug=true < ../parts.hg2
   bundle2-input: start processing of HG20 stream
   bundle2-input: reading bundle2 stream parameters
   options count: 0
@@ -549,7 +549,7 b' Test actual unbundling of test part'
 
 Process the bundle
 
-  $ hg unbundle2 --debug --config progress.debug=true < ../parts.hg2
+  $ hg unbundle2 --debug --config progress.debug=true --config devel.bundle2.debug=true < ../parts.hg2
   bundle2-input: start processing of HG20 stream
   bundle2-input: reading bundle2 stream parameters
   bundle2-input-bundle: with-transaction
@@ -749,7 +749,7 b' Support for changegroup'
   @  0:3903775176ed draft test  a
   
 
-  $ hg bundle2 --debug --config progress.debug=true --rev '8+7+5+4' ../rev.hg2
+  $ hg bundle2 --debug --config progress.debug=true --config devel.bundle2.debug=true --rev '8+7+5+4' ../rev.hg2
   4 changesets found
   list of changesets:
   32af7686d403cf45b5d95f2d70cebea587ac806a