patch 8.0.0946: using PATH_MAX does not work well on some systems

Problem:    Using PATH_MAX does not work well on some systems.
Solution:   use MAXPATHL instead. (James McCoy, closes #1973)

Author: brammool

src/main.c

@@ -2473,10 +2473,10 @@ command_line_scan(mparm_T *parmp)
 	     */
 	    if (vim_strpbrk(p, "\\:") != NULL && !path_with_url(p))
 	    {
-		char posix_path[PATH_MAX];
+		char posix_path[MAXPATHL];
 
 # if CYGWIN_VERSION_DLL_MAJOR >= 1007
-		cygwin_conv_path(CCP_WIN_A_TO_POSIX, p, posix_path, PATH_MAX);
+		cygwin_conv_path(CCP_WIN_A_TO_POSIX, p, posix_path, MAXPATHL);
 # else
 		cygwin_conv_to_posix_path(p, posix_path);
 # endif
@@ -3598,10 +3598,10 @@ set_progpath(char_u *argv0)
     char_u *val = argv0;
 
 # ifdef PROC_EXE_LINK
-    char    buf[PATH_MAX + 1];
+    char    buf[MAXPATHL + 1];
     ssize_t len;
 
-    len = readlink(PROC_EXE_LINK, buf, PATH_MAX);
+    len = readlink(PROC_EXE_LINK, buf, MAXPATHL);
     if (len > 0)
     {
 	buf[len] = NUL;

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    946,
 /**/
     945,
 /**/