vim-patch:9.1.1081: has('bsd') is true for GNU/Hurd

Problem:  has('bsd') is true for GNU/Hurd
Solution: exclude GNU/Hurd from BSD feature flag
          (Zhaoming Luo)

GNU/Hurd, like Mac OS X, is a BSD-based system. It should exclude
has('bsd') feature just like what Mac OS X does. The __GNU__ pre-defined
macro indicates it's compiled for GNU/Hurd.

closes: vim/vim#16580

a41dfcd55b

Co-authored-by: Zhaoming Luo <zhmingluo@163.com>

runtime/doc/builtin.txt

@@ -4597,6 +4597,7 @@ has({feature})                                                           *has()*
 			fname_case	Case in file names matters (for Darwin and MS-Windows
 					this is not present).
 			gui_running	Nvim has a GUI.
+			hurd		GNU/Hurd system.
 			iconv		Can use |iconv()| for conversion.
 			linux		Linux system.
 			mac		MacOS system.

runtime/lua/vim/_meta/vimfn.lua

@@ -4148,6 +4148,7 @@ function vim.fn.globpath(path, expr, nosuf, list, allinks) end
 ---   fname_case  Case in file names matters (for Darwin and MS-Windows
 ---       this is not present).
 ---   gui_running  Nvim has a GUI.
+---   hurd    GNU/Hurd system.
 ---   iconv    Can use |iconv()| for conversion.
 ---   linux    Linux system.
 ---   mac    MacOS system.

src/nvim/eval.lua

@@ -5119,6 +5119,7 @@ M.funcs = {
       	fname_case	Case in file names matters (for Darwin and MS-Windows
       			this is not present).
       	gui_running	Nvim has a GUI.
+      	hurd		GNU/Hurd system.
       	iconv		Can use |iconv()| for conversion.
       	linux		Linux system.
       	mac		MacOS system.

src/nvim/eval/funcs.c

@@ -3075,9 +3075,12 @@ static void f_gettext(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
 static void f_has(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
 {
   static const char *const has_list[] = {
-#if defined(BSD) && !defined(__APPLE__)
+#if defined(BSD) && !defined(__APPLE__) && !defined(__GNU__)
     "bsd",
 #endif
+#ifdef __GNU__
+    "hurd",
+#endif
 #ifdef __linux__
     "linux",
 #endif

test/old/testdir/test_functions.vim

@@ -2717,6 +2717,7 @@ func Test_platform_name()
   " Is Unix?
   call assert_equal(has('bsd'), has('bsd') && has('unix'))
   call assert_equal(has('hpux'), has('hpux') && has('unix'))
+  call assert_equal(has('hurd'), has('hurd') && has('unix'))
   call assert_equal(has('linux'), has('linux') && has('unix'))
   call assert_equal(has('mac'), has('mac') && has('unix'))
   call assert_equal(has('qnx'), has('qnx') && has('unix'))
@@ -2734,6 +2735,7 @@ func Test_platform_name()
     call assert_equal(uname =~? 'QNX', has('qnx'))
     call assert_equal(uname =~? 'SunOS', has('sun'))
     call assert_equal(uname =~? 'CYGWIN\|MSYS', has('win32unix'))
+    call assert_equal(uname =~? 'GNU', has('hurd'))
   endif
 endfunc