Add support for Daitch-Mokotoff Soundex in contrib/fuzzystrmatch.

This modernized version of Soundex works significantly better than
the original, particularly for non-English names.

Dag Lem, reviewed by quite a few people along the way

Discussion: https://postgr.es/m/yger1atbgfy.fsf@sid.nimrod.no

Author: tglsfdc

contrib/fuzzystrmatch/.gitignore

@@ -1,3 +1,5 @@
+# Generated files
+/daitch_mokotoff.h
 # Generated subdirectories
 /log/
 /results/

contrib/fuzzystrmatch/Makefile

@@ -3,14 +3,17 @@
 MODULE_big = fuzzystrmatch
 OBJS = \
 	$(WIN32RES) \
+	daitch_mokotoff.o \
 	dmetaphone.o \
 	fuzzystrmatch.o
 
 EXTENSION = fuzzystrmatch
-DATA = fuzzystrmatch--1.1.sql fuzzystrmatch--1.0--1.1.sql
+DATA = fuzzystrmatch--1.1.sql fuzzystrmatch--1.1--1.2.sql \
+	fuzzystrmatch--1.0--1.1.sql
+
 PGFILEDESC = "fuzzystrmatch - similarities and distance between strings"
 
-REGRESS = fuzzystrmatch
+REGRESS = fuzzystrmatch fuzzystrmatch_utf8
 
 ifdef USE_PGXS
 PG_CONFIG = pg_config
@@ -22,3 +25,16 @@ top_builddir = ../..
 include $(top_builddir)/src/Makefile.global
 include $(top_srcdir)/contrib/contrib-global.mk
 endif
+
+# Force this dependency to be known even without dependency info built:
+daitch_mokotoff.o: daitch_mokotoff.h
+
+daitch_mokotoff.h: daitch_mokotoff_header.pl
+	$(PERL) $< $@
+
+# daitch_mokotoff.h is included in tarballs, so it has to be made by
+# "distprep" and not cleaned except by "maintainer-clean".
+distprep: daitch_mokotoff.h
+
+maintainer-clean:
+	rm -f daitch_mokotoff.h