wscript: the i18n worker functions doesn't define the i18n waf commands

Rename the worker functions to make it clear that their name in this
case isn't magic. These functions "are not" the waf commands. It is the
custom build context class definitions that define the i18n commands ...
which will invoke these top level worker functions which in turn invoke
the others recursively.

The bare printing of the build environment in the top level i18n command
seems to be old debug code that safely can be removed.

gtk2_ardour/wscript

@@ -962,26 +962,26 @@ def build(bld):
             bld.install_as (os.path.join(os.path.normpath(bld.env['LOCALEDIR']), lang, 'LC_MESSAGES', I18N_PACKAGE + '.mo'),
                             mo)
 
-def i18n(bld):
+def i18n_func(bld):
     I18N_PACKAGE = 'gtk2_ardour' + bld.env['MAJOR']
     autowaf.build_i18n(bld, '.', 'gtk2_ardour', I18N_PACKAGE, gtk2_ardour_sources,
                        'Paul Davis')
     appdata_i18n_pot(bld)
     appdata_i18n_po(bld)
 
-def i18n_pot(bld):
+def i18n_pot_func(bld):
     I18N_PACKAGE = 'gtk2_ardour' + bld.env['MAJOR']
     autowaf.build_i18n_pot(bld, '.', 'gtk2_ardour', I18N_PACKAGE, gtk2_ardour_sources,
                            'Paul Davis')
     appdata_i18n_pot(bld)
 
-def i18n_po(bld):
+def i18n_po_func(bld):
     I18N_PACKAGE = 'gtk2_ardour' + bld.env['MAJOR']
     autowaf.build_i18n_po(bld, '.', 'gtk2_ardour', I18N_PACKAGE, gtk2_ardour_sources,
                           'Paul Davis')
     appdata_i18n_po(bld)
 
-def i18n_mo(bld):
+def i18n_mo_func(bld):
     I18N_PACKAGE = 'gtk2_ardour' + bld.env['MAJOR']
     autowaf.build_i18n_mo(bld, '.', 'gtk2_ardour', I18N_PACKAGE, gtk2_ardour_sources,
                           'Paul Davis')

libs/appleutility/wscript

@@ -51,6 +51,3 @@ def build(bld):
     obj.name           = 'libappleutility'
     obj.target         = 'appleutility'
     obj.install_path   = os.path.join(bld.env['LIBDIR'], 'appleutility')
-
-def i18n(bld):
-    pass

libs/ardour/wscript

@@ -736,18 +736,18 @@ def create_ardour_test_program(bld, includes, name, target, sources):
         'LOCALEDIR="' + os.path.normpath(bld.env['LOCALEDIR']) + '"',
         ]
 
-def i18n(bld):
+def i18n_func(bld):
     autowaf.build_i18n(bld, '.', 'libs/ardour', I18N_PACKAGE + bld.env['MAJOR'], libardour_sources,
                        'Paul Davis')
 
-def i18n_pot(bld):
+def i18n_pot_func(bld):
     autowaf.build_i18n(bld, '.', 'libs/ardour', I18N_PACKAGE + bld.env['MAJOR'], libardour_sources,
                        'Paul Davis')
 
-def i18n_po(bld):
+def i18n_po_func(bld):
     autowaf.build_i18n_po(bld, '.', 'libs/ardour', I18N_PACKAGE + bld.env['MAJOR'], libardour_sources,
                        'Paul Davis')
 
-def i18n_mo(bld):
+def i18n_mo_func(bld):
     autowaf.build_i18n_mo(bld, '.', 'libs/ardour', I18N_PACKAGE + bld.env['MAJOR'], libardour_sources,
                        'Paul Davis')

libs/gtkmm2ext/wscript

@@ -99,18 +99,18 @@ def build(bld):
             bld.install_as (os.path.join(os.path.normpath(bld.env['LOCALEDIR']), lang, 'LC_MESSAGES', I18N_PACKAGE + '.mo'),
                             mo)
 
-def i18n(bld):
+def i18n_func(bld):
     autowaf.build_i18n(bld, '.', 'libs/gtkmm2ext', I18N_PACKAGE, gtkmm2ext_sources,
                        'Paul Davis')
 
-def i18n_pot(bld):
+def i18n_pot_func(bld):
     autowaf.build_i18n_pot(bld, '.', 'libs/gtkmm2ext', I18N_PACKAGE, gtkmm2ext_sources,
                        'Paul Davis')
 
-def i18n_po(bld):
+def i18n_po_func(bld):
     autowaf.build_i18n_po(bld, '.', 'libs/gtkmm2ext', I18N_PACKAGE, gtkmm2ext_sources,
                        'Paul Davis')
 
-def i18n_mo(bld):
+def i18n_mo_func(bld):
     autowaf.build_i18n_mo(bld, '.', 'libs/gtkmm2ext', I18N_PACKAGE, gtkmm2ext_sources,
                        'Paul Davis')

wscript

@@ -1677,31 +1677,30 @@ def build(bld):
 
 class _i18n_build_context(BuildContext):
     cmd = 'i18n'
-    fun = 'i18n'
+    fun = 'i18n_func'
 
-def i18n(bld):
-    print(bld.env)
+def i18n_func(bld):
     bld.recurse (i18n_children)
 
 class _i18n_pot_build_context(BuildContext):
     cmd = 'i18n_pot'
-    fun = 'i18n_pot'
+    fun = 'i18n_pot_func'
 
-def i18n_pot(bld):
+def i18n_pot_func(bld):
     bld.recurse (i18n_children)
 
 class _i18n_po_build_context(BuildContext):
     cmd = 'i18n_po'
-    fun = 'i18n_po'
+    fun = 'i18n_po_func'
 
-def i18n_po(bld):
+def i18n_po_func(bld):
     bld.recurse (i18n_children)
 
 class _i18n_mo_build_context(BuildContext):
     cmd = 'i18n_mo'
-    fun = 'i18n_mo'
+    fun = 'i18n_mo_func'
 
-def i18n_mo(bld):
+def i18n_mo_func(bld):
     bld.recurse (i18n_children)
 
 def tarball(bld):