Update to mpfr-4.1.0.

ports/libmpfr/libmpfr.patch

@@ -1,12 +0,0 @@
-diff -Paur --no-dereference -- libmpfr.upstream/config.sub libmpfr/config.sub
---- libmpfr.upstream/config.sub
-+++ libmpfr/config.sub
-@@ -1373,7 +1373,7 @@
- 	      | -hpux* | -unos* | -osf* | -luna* | -dgux* | -auroraux* | -solaris* \
- 	      | -sym* | -kopensolaris* | -plan9* \
- 	      | -amigaos* | -amigados* | -msdos* | -newsos* | -unicos* | -aof* \
--	      | -aos* | -aros* \
-+	      | -aos* | -aros* | -sortix* \
- 	      | -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \
- 	      | -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \
- 	      | -hiux* | -386bsd* | -knetbsd* | -mirbsd* | -netbsd* \

ports/libmpfr/libmpfr.port

@@ -1,12 +1,13 @@
 NAME=libmpfr
 BUILD_LIBRARIES='libstdc++ libgmp'
-VERSION=3.1.3
+VERSION=4.1.0
 DISTNAME=mpfr-$VERSION
 COMPRESSION=tar.xz
 ARCHIVE=$DISTNAME.$COMPRESSION
-SHA256SUM=6835a08bd992c8257641791e9a6a2b35b02336c8de26d0a8577953747e514a16
+SHA256SUM=0c98a3f1732ff6ca4ea690552079da9c597872d30e96ec28414ee23c95558a7f
 UPSTREAM_SITE=https://ftp.gnu.org/gnu/mpfr
 UPSTREAM_ARCHIVE=$ARCHIVE
+LICENSE=LGPL-3.0-or-later
 BUILD_SYSTEM=configure
 CONFIGURE_USE_BUILD_DIRECTORY=true
 POST_INSTALL=tix-eradicate-libtool-la