Fix typo detected by codespell 2.0.0

Also avoid some new false positives

INSTALL

@@ -328,7 +328,7 @@ Optional features:
 
   --with-interfaces=no, --without-interfaces
 	This option keeps sudo from trying to glean the ip address
-	from each attached Ethernet interface.  It is only useful
+	from each attached network interface.  It is only useful
 	on a machine where sudo's interface reading support does
 	not work, which may be the case on some SysV-based OS's
 	using STREAMS.

configure

@@ -1809,7 +1809,7 @@ Optional Packages:
   --with-ldap-conf-file   path to LDAP configuration file
   --with-ldap-secret-file path to LDAP secret password file
   --with-secure-path      override the user's path with a built-in one
-  --without-interfaces    don't try to read the ip addr of ether interfaces
+  --without-interfaces    don't try to read the ip addr of network interfaces
   --with-askpass=PATH     Fully qualified pathname of askpass helper
   --with-exampledir=DIR   path to install sudo examples in
   --with-plugindir=DIR    set directory to load plugins from

configure.ac

@@ -1233,7 +1233,7 @@ AC_ARG_WITH(secure-path, [AS_HELP_STRING([--with-secure-path], [override the use
 esac], AC_MSG_RESULT(no))
 
 AC_MSG_CHECKING(whether to get ip addresses from the network interfaces)
-AC_ARG_WITH(interfaces, [AS_HELP_STRING([--without-interfaces], [don't try to read the ip addr of ether interfaces])],
+AC_ARG_WITH(interfaces, [AS_HELP_STRING([--without-interfaces], [don't try to read the ip addr of network interfaces])],
 [case $with_interfaces in
     yes)	AC_MSG_RESULT(yes)
 		;;

etc/codespell.exclude

@@ -1,3 +1,4 @@
+    "You empty-headed animal food trough wiper!",
  * Returns true if any tags set in nt differ between ot and nt, else false.
 #define TAGS_CHANGED(ot, nt) \
     ((TAG_SET((nt).follow) && (nt).follow != (ot).follow) || \

plugins/sudoers/env.c

@@ -872,7 +872,7 @@ env_update_didvar(const char *ep, unsigned int *didvar)
 } while (0)
 
 /*
- * Build a new environment and ether clear potentially dangerous
+ * Build a new environment and either clear potentially dangerous
  * variables from the old one or start with a clean slate.
  * Also adds sudo-specific variables (SUDO_*).
  * Returns true on success or false on failure.