When running a login shell with a login_class specified, use

LOGIN_SETENV instead of rolling our own login.conf setenv support
since FreeBSD's login.conf has more than just setenv capabilities.
This requires us to swap the plugin-provided envp for the global
environ before calling setusercontext() and then stash the resulting
environ pointer back into the command details, which is kind of a
hack.

plugins/sudoers/env.c

@@ -98,6 +98,7 @@ struct environment {
 /*
  * Prototypes
  */
+static void sudo_setenv(const char *, const char *, int);
 static void sudo_putenv(char *, int, int);
 
 /*
@@ -239,7 +240,7 @@ env_get(void)
  * (not environ) and it always overwrites.  The dupcheck param determines
  * whether we need to verify that the variable is not already set.
  */
-void
+static void
 sudo_setenv(const char *var, const char *val, int dupcheck)
 {
     char *estring;