nuspell: update to 3.1.2.

- Internal refactorings that reduce function templates in `utils` and `finder`.

- File `utils.hxx` is not installed any more. It is a private header.

- Some functions for searching dictionaries in class `Finder` are deprecated as
  they were searching in directories that no longer contain dictionaries.

- Updated description in README. Packagers are encouraged to update it in their
  packages.
- Moved Hunspell files from the directory "src" into the directory named
  "external" to clarify that it is third-party dependency. Previously, some
  packagers confused Hunspell's license notices as part of Nuspell. Hunspell is
  used only for testing and it is not part of the main program.

- Fixed bugs on FreeBSD and other BSDs related to encoding conversions. Now
  all tests pass on FreeBSD and the support for it is not experimental anymore.
- Fixed compiling on NetBSD.

nuspell/Makefile

@@ -1,6 +1,6 @@
 # $NetBSD$
 
-DISTNAME=	nuspell-3.1.0
+DISTNAME=	nuspell-3.1.2
 CATEGORIES=	textproc wip
 MASTER_SITES=	${MASTER_SITE_GITHUB:=nuspell/}
 GITHUB_TAG=	v${PKGVERSION_NOREV}

nuspell/PLIST

@@ -4,7 +4,6 @@ include/nuspell/aff_data.hxx
 include/nuspell/dictionary.hxx
 include/nuspell/finder.hxx
 include/nuspell/structures.hxx
-include/nuspell/utils.hxx
 lib/cmake/nuspell/NuspellConfig.cmake
 lib/cmake/nuspell/NuspellConfigVersion.cmake
 lib/cmake/nuspell/NuspellTargets-release.cmake

nuspell/distinfo

@@ -1,7 +1,6 @@
 $NetBSD$
 
-SHA1 (nuspell-3.1.0.tar.gz) = 1ab32d19d60b936c04e789562c333cfbafdfd2de
-RMD160 (nuspell-3.1.0.tar.gz) = 71c061e71ae5387bacdd4d90425863fc816fb6ee
-SHA512 (nuspell-3.1.0.tar.gz) = a9bedfd6e2d77fd34d249cf7aa1fcb6bde5bced26f02f8a2dd860416a61488c9b7016a0df6015052fcccb272b342e6205db601107f46efa44c9d78ce261a826c
-Size (nuspell-3.1.0.tar.gz) = 407196 bytes
-SHA1 (patch-src_nuspell_utils.hxx) = b5b4f5819cb98c6ec827f02f24755fd0a6de9edf
+SHA1 (nuspell-3.1.2.tar.gz) = b6ff194a0a501ff3f6d964c39cb4d084c58b1bea
+RMD160 (nuspell-3.1.2.tar.gz) = b0bf7d83ee00cb01c61c9064bf6e7419c6252a11
+SHA512 (nuspell-3.1.2.tar.gz) = ed5206cb9ffa7e4ec6843988a75627d4ae7d5170444b6e7bd3496c1bf61c25412c4e68864800f2ad238d014b4e50d25282f367de2900f8a230f3ecc9ae5772be
+Size (nuspell-3.1.2.tar.gz) = 379029 bytes

nuspell/patches/patch-src_nuspell_utils.hxx

@@ -1,13 +0,0 @@
-$NetBSD$
-
---- src/nuspell/utils.hxx.orig	2019-11-23 18:52:51.000000000 +0000
-+++ src/nuspell/utils.hxx
-@@ -111,7 +111,7 @@ class Encoding_Converter {
- };
- 
- //#if _POSIX_VERSION >= 200809L
--#ifdef _POSIX_VERSION
-+#if defined(_POSIX_VERSION) && !defined(__NetBSD__)
- class Setlocale_To_C_In_Scope {
- 	locale_t old_loc = nullptr;
-