Rename *.template to *.in

Apparently the `.template` extension is commonly used in macOS for a
word processor template file.

See issue #206.

Makefile.am

@@ -32,23 +32,23 @@ subst = sed \
 	-e 's|@runstatedir[@]|$(runstatedir)|g' \
 	-e 's|@sysconfdir[@]|$(sysconfdir)|g'
 
-# Files that will be generated by passing their *.template file
-# through $(subst).
+# Files that will be generated by passing their *.in file through
+# $(subst).
 subst_files = ddclient ddclient.conf
 
-EXTRA_DIST += $(subst_files:=.template)
+EXTRA_DIST += $(subst_files:=.in)
 CLEANFILES += $(subst_files)
 
 $(subst_files): Makefile
 	rm -f '$@' '$@'.tmp
-	in='$@'.template; \
+	in='$@'.in; \
 		test -f "$${in}" || in='$(srcdir)/'$${in}; \
 		$(subst) "$${in}" >'$@'.tmp && \
 		{ ! test -x "$${in}" || chmod +x '$@'.tmp; }
 	mv '$@'.tmp '$@'
 
-ddclient: $(srcdir)/ddclient.template
-ddclient.conf: $(srcdir)/ddclient.conf.template
+ddclient: $(srcdir)/ddclient.in
+ddclient.conf: $(srcdir)/ddclient.conf.in
 
 bin_SCRIPTS = ddclient
 

configure.ac

@@ -1,6 +1,6 @@
 AC_PREREQ([2.63])
 AC_INIT([ddclient], [3.9.1])
-AC_CONFIG_SRCDIR([ddclient.template])
+AC_CONFIG_SRCDIR([ddclient.in])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
 AC_REQUIRE_AUX_FILE([tap-driver.sh])