Update documentation for git.

Makefile.am

@@ -9,10 +9,7 @@ ACLOCAL_AMFLAGS = -I m4
 EXTRA_DIST = config.rpath mkinstalldirs have.h system.h COPYING.README depcomp
 
 ChangeLog:
-	svn log > ChangeLog
-
-svn-clean: maintainer-clean
-	svn status --no-ignore | sed -n 's/^[?I] \+//p' | tr '\012' '\0' | xargs -r0 rm -rf
+	git log > ChangeLog
 
 deb:
 	dpkg-buildpackage -rfakeroot

README.git

@@ -1,4 +1,4 @@
-Before you can start compiling tinc from a clean Subversion checkout, you have
+Before you can start compiling tinc from a fresh git clone, you have
 to install the very latest versions of the following packages:
 
 - OpenSSL
@@ -22,4 +22,4 @@ make dist
 
 To clean up your working copy so that no autogenerated files remain, run:
 
-make svn-clean
+git clean