build: move the syntax files out of the doc/ directory

They are not documentation, they are functional elements of nano.
diff --git a/Makefile.am b/Makefile.am
index 633e580..38b9f4e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -2,6 +2,10 @@
 
 SUBDIRS = doc m4 po src
 
+if USE_COLOR
+SUBDIRS += syntax
+endif
+
 EXTRA_DIST = ChangeLog.pre-2.1 IMPROVEMENTS README.GIT nano.spec
 
 ACLOCAL_AMFLAGS = -I m4
diff --git a/configure.ac b/configure.ac
index dcdf361..04b3b50 100644
--- a/configure.ac
+++ b/configure.ac
@@ -752,10 +752,10 @@
 Makefile
 doc/Makefile
 doc/nanorc.sample
-doc/syntax/Makefile
 m4/Makefile
 po/Makefile.in
 src/Makefile
+syntax/Makefile
 nano.spec
 ])
 
diff --git a/doc/Makefile.am b/doc/Makefile.am
index cac1d8d..1cbb313 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -1,10 +1,6 @@
 SUBDIRS =
 BUILT_SOURCES =
 
-if USE_COLOR
-SUBDIRS += syntax
-endif
-
 dist_html_DATA = faq.html
 
 dist_man_MANS = nano.1 rnano.1
diff --git a/doc/syntax/Makefile.am b/syntax/Makefile.am
similarity index 100%
rename from doc/syntax/Makefile.am
rename to syntax/Makefile.am
diff --git a/doc/syntax/asm.nanorc b/syntax/asm.nanorc
similarity index 100%
rename from doc/syntax/asm.nanorc
rename to syntax/asm.nanorc
diff --git a/doc/syntax/autoconf.nanorc b/syntax/autoconf.nanorc
similarity index 100%
rename from doc/syntax/autoconf.nanorc
rename to syntax/autoconf.nanorc
diff --git a/doc/syntax/awk.nanorc b/syntax/awk.nanorc
similarity index 100%
rename from doc/syntax/awk.nanorc
rename to syntax/awk.nanorc
diff --git a/doc/syntax/c.nanorc b/syntax/c.nanorc
similarity index 100%
rename from doc/syntax/c.nanorc
rename to syntax/c.nanorc
diff --git a/doc/syntax/changelog.nanorc b/syntax/changelog.nanorc
similarity index 100%
rename from doc/syntax/changelog.nanorc
rename to syntax/changelog.nanorc
diff --git a/doc/syntax/cmake.nanorc b/syntax/cmake.nanorc
similarity index 100%
rename from doc/syntax/cmake.nanorc
rename to syntax/cmake.nanorc
diff --git a/doc/syntax/css.nanorc b/syntax/css.nanorc
similarity index 100%
rename from doc/syntax/css.nanorc
rename to syntax/css.nanorc
diff --git a/doc/syntax/debian.nanorc b/syntax/debian.nanorc
similarity index 100%
rename from doc/syntax/debian.nanorc
rename to syntax/debian.nanorc
diff --git a/doc/syntax/default.nanorc b/syntax/default.nanorc
similarity index 100%
rename from doc/syntax/default.nanorc
rename to syntax/default.nanorc
diff --git a/doc/syntax/elisp.nanorc b/syntax/elisp.nanorc
similarity index 100%
rename from doc/syntax/elisp.nanorc
rename to syntax/elisp.nanorc
diff --git a/doc/syntax/fortran.nanorc b/syntax/fortran.nanorc
similarity index 100%
rename from doc/syntax/fortran.nanorc
rename to syntax/fortran.nanorc
diff --git a/doc/syntax/gentoo.nanorc b/syntax/gentoo.nanorc
similarity index 100%
rename from doc/syntax/gentoo.nanorc
rename to syntax/gentoo.nanorc
diff --git a/doc/syntax/go.nanorc b/syntax/go.nanorc
similarity index 100%
rename from doc/syntax/go.nanorc
rename to syntax/go.nanorc
diff --git a/doc/syntax/groff.nanorc b/syntax/groff.nanorc
similarity index 100%
rename from doc/syntax/groff.nanorc
rename to syntax/groff.nanorc
diff --git a/doc/syntax/guile.nanorc b/syntax/guile.nanorc
similarity index 100%
rename from doc/syntax/guile.nanorc
rename to syntax/guile.nanorc
diff --git a/doc/syntax/html.nanorc b/syntax/html.nanorc
similarity index 100%
rename from doc/syntax/html.nanorc
rename to syntax/html.nanorc
diff --git a/doc/syntax/java.nanorc b/syntax/java.nanorc
similarity index 100%
rename from doc/syntax/java.nanorc
rename to syntax/java.nanorc
diff --git a/doc/syntax/javascript.nanorc b/syntax/javascript.nanorc
similarity index 100%
rename from doc/syntax/javascript.nanorc
rename to syntax/javascript.nanorc
diff --git a/doc/syntax/json.nanorc b/syntax/json.nanorc
similarity index 100%
rename from doc/syntax/json.nanorc
rename to syntax/json.nanorc
diff --git a/doc/syntax/lua.nanorc b/syntax/lua.nanorc
similarity index 100%
rename from doc/syntax/lua.nanorc
rename to syntax/lua.nanorc
diff --git a/doc/syntax/makefile.nanorc b/syntax/makefile.nanorc
similarity index 100%
rename from doc/syntax/makefile.nanorc
rename to syntax/makefile.nanorc
diff --git a/doc/syntax/man.nanorc b/syntax/man.nanorc
similarity index 100%
rename from doc/syntax/man.nanorc
rename to syntax/man.nanorc
diff --git a/doc/syntax/mgp.nanorc b/syntax/mgp.nanorc
similarity index 100%
rename from doc/syntax/mgp.nanorc
rename to syntax/mgp.nanorc
diff --git a/doc/syntax/mutt.nanorc b/syntax/mutt.nanorc
similarity index 100%
rename from doc/syntax/mutt.nanorc
rename to syntax/mutt.nanorc
diff --git a/doc/syntax/nanorc.nanorc b/syntax/nanorc.nanorc
similarity index 100%
rename from doc/syntax/nanorc.nanorc
rename to syntax/nanorc.nanorc
diff --git a/doc/syntax/nftables.nanorc b/syntax/nftables.nanorc
similarity index 100%
rename from doc/syntax/nftables.nanorc
rename to syntax/nftables.nanorc
diff --git a/doc/syntax/objc.nanorc b/syntax/objc.nanorc
similarity index 100%
rename from doc/syntax/objc.nanorc
rename to syntax/objc.nanorc
diff --git a/doc/syntax/ocaml.nanorc b/syntax/ocaml.nanorc
similarity index 100%
rename from doc/syntax/ocaml.nanorc
rename to syntax/ocaml.nanorc
diff --git a/doc/syntax/patch.nanorc b/syntax/patch.nanorc
similarity index 100%
rename from doc/syntax/patch.nanorc
rename to syntax/patch.nanorc
diff --git a/doc/syntax/perl.nanorc b/syntax/perl.nanorc
similarity index 100%
rename from doc/syntax/perl.nanorc
rename to syntax/perl.nanorc
diff --git a/doc/syntax/php.nanorc b/syntax/php.nanorc
similarity index 100%
rename from doc/syntax/php.nanorc
rename to syntax/php.nanorc
diff --git a/doc/syntax/po.nanorc b/syntax/po.nanorc
similarity index 100%
rename from doc/syntax/po.nanorc
rename to syntax/po.nanorc
diff --git a/doc/syntax/postgresql.nanorc b/syntax/postgresql.nanorc
similarity index 100%
rename from doc/syntax/postgresql.nanorc
rename to syntax/postgresql.nanorc
diff --git a/doc/syntax/pov.nanorc b/syntax/pov.nanorc
similarity index 100%
rename from doc/syntax/pov.nanorc
rename to syntax/pov.nanorc
diff --git a/doc/syntax/python.nanorc b/syntax/python.nanorc
similarity index 100%
rename from doc/syntax/python.nanorc
rename to syntax/python.nanorc
diff --git a/doc/syntax/ruby.nanorc b/syntax/ruby.nanorc
similarity index 100%
rename from doc/syntax/ruby.nanorc
rename to syntax/ruby.nanorc
diff --git a/doc/syntax/rust.nanorc b/syntax/rust.nanorc
similarity index 100%
rename from doc/syntax/rust.nanorc
rename to syntax/rust.nanorc
diff --git a/doc/syntax/sh.nanorc b/syntax/sh.nanorc
similarity index 100%
rename from doc/syntax/sh.nanorc
rename to syntax/sh.nanorc
diff --git a/doc/syntax/spec.nanorc b/syntax/spec.nanorc
similarity index 100%
rename from doc/syntax/spec.nanorc
rename to syntax/spec.nanorc
diff --git a/doc/syntax/tcl.nanorc b/syntax/tcl.nanorc
similarity index 100%
rename from doc/syntax/tcl.nanorc
rename to syntax/tcl.nanorc
diff --git a/doc/syntax/tex.nanorc b/syntax/tex.nanorc
similarity index 100%
rename from doc/syntax/tex.nanorc
rename to syntax/tex.nanorc
diff --git a/doc/syntax/texinfo.nanorc b/syntax/texinfo.nanorc
similarity index 100%
rename from doc/syntax/texinfo.nanorc
rename to syntax/texinfo.nanorc
diff --git a/doc/syntax/xml.nanorc b/syntax/xml.nanorc
similarity index 100%
rename from doc/syntax/xml.nanorc
rename to syntax/xml.nanorc