Revert "* debian: Ignore *.local."

This reverts commit 39f3da43ac.  This
customisation mechanism was not documented and doesn't seem to be
used.

Also revert the corresponding line in .gitignore.

debian/.gitignore

@@ -3,7 +3,6 @@
 !*.diff
 !series
 *.debhelper*
-*.local
 *.pyc
 *.substvars
 *-di

debian/rules.defs

@@ -3,4 +3,3 @@ include /usr/share/dpkg/default.mk
 BUILD_DIR = debian/build
 STAMPS_DIR = debian/stamps
 
--include debian/rules.defs.local

debian/source/options

@@ -1,2 +1 @@
 compression = "xz"
-tar-ignore = debian/*.local