fix(source): use ftp.gnu.org as primary, ftpmirror.gnu.org as fallback

All GNU packages now use ftp.gnu.org (stable canonical server) as the
primary filelist source, with ftpmirror.gnu.org configured as
source-mirror fallback. ftpmirror uses DNS round-robin across many
mirrors of varying reliability; this setup eliminates random CI failures
caused by unreachable mirror nodes while preserving a fallback path.

config/artifact/ncurses.yml

@@ -3,6 +3,10 @@ ncurses:
     license-files:
       - COPYING
   source:
+    type: filelist
+    url: 'https://ftp.gnu.org/gnu/ncurses/'
+    regex: '/href="(?<file>ncurses-(?<version>[^"]+)\.tar\.gz)"/'
+  source-mirror:
     type: filelist
     url: 'https://ftpmirror.gnu.org/gnu/ncurses/'
     regex: '/href="(?<file>ncurses-(?<version>[^"]+)\.tar\.gz)"/'

config/pkg/lib/gettext.yml

@@ -2,6 +2,10 @@ gettext:
   type: library
   artifact:
     source:
+      type: filelist
+      url: 'https://ftp.gnu.org/gnu/gettext/'
+      regex: '/href="(?<file>gettext-(?<version>[^"]+)\.tar\.xz)"/'
+    source-mirror:
       type: filelist
       url: 'https://ftpmirror.gnu.org/gnu/gettext/'
       regex: '/href="(?<file>gettext-(?<version>[^"]+)\.tar\.xz)"/'

config/pkg/lib/gmp.yml

@@ -3,11 +3,12 @@ gmp:
   artifact:
     source:
       type: filelist
-      url: 'https://ftpmirror.gnu.org/gnu/gmp/'
+      url: 'https://ftp.gnu.org/gnu/gmp/'
       regex: '/href="(?<file>gmp-(?<version>[^"]+)\.tar\.xz)"/'
     source-mirror:
-      type: url
+      type: filelist
-      url: 'https://dl.static-php.dev/static-php-cli/deps/gmp/gmp-6.3.0.tar.xz'
+      url: 'https://ftpmirror.gnu.org/gnu/gmp/'
+      regex: '/href="(?<file>gmp-(?<version>[^"]+)\.tar\.xz)"/'
     metadata:
       license-files: ['@/gmp.txt']
       license: Custom

config/pkg/lib/idn2.yml

@@ -2,6 +2,10 @@ idn2:
   type: library
   artifact:
     source:
+      type: filelist
+      url: 'https://ftp.gnu.org/gnu/libidn/'
+      regex: '/href="(?<file>libidn2-(?<version>[^"]+)\.tar\.gz)"/'
+    source-mirror:
       type: filelist
       url: 'https://ftpmirror.gnu.org/gnu/libidn/'
       regex: '/href="(?<file>libidn2-(?<version>[^"]+)\.tar\.gz)"/'

config/pkg/lib/libiconv.yml

@@ -2,6 +2,10 @@ libiconv:
   type: library
   artifact:
     source:
+      type: filelist
+      url: 'https://ftp.gnu.org/gnu/libiconv/'
+      regex: '/href="(?<file>libiconv-(?<version>[^"]+)\.tar\.gz)"/'
+    source-mirror:
       type: filelist
       url: 'https://ftpmirror.gnu.org/gnu/libiconv/'
       regex: '/href="(?<file>libiconv-(?<version>[^"]+)\.tar\.gz)"/'

config/pkg/lib/libunistring.yml

@@ -2,6 +2,10 @@ libunistring:
   type: library
   artifact:
     source:
+      type: filelist
+      url: 'https://ftp.gnu.org/gnu/libunistring/'
+      regex: '/href="(?<file>libunistring-(?<version>[^"]+)\.tar\.gz)"/'
+    source-mirror:
       type: filelist
       url: 'https://ftpmirror.gnu.org/gnu/libunistring/'
       regex: '/href="(?<file>libunistring-(?<version>[^"]+)\.tar\.gz)"/'

config/pkg/lib/readline.yml

@@ -2,6 +2,10 @@ readline:
   type: library
   artifact:
     source:
+      type: filelist
+      url: 'https://ftp.gnu.org/gnu/readline/'
+      regex: '/href="(?<file>readline-(?<version>[^"]+)\.tar\.gz)"/'
+    source-mirror:
       type: filelist
       url: 'https://ftpmirror.gnu.org/gnu/readline/'
       regex: '/href="(?<file>readline-(?<version>[^"]+)\.tar\.gz)"/'