Do not check userPassword with 7-bit plugin

Default list of attributes that are checked with 7-bit plugin
for being 7-bit clean includes userPassword. Consecutively, one
is unable to set passwords that contain non-ascii characters.

https://fedorahosted.org/freeipa/ticket/3640

install/updates/50-7_bit_check.update

@@ -0,0 +1,6 @@
+# Remove userPassword from the list of attributes checked by 7-bit plugin
+# Replace argument value 'userPassword' with 'mail' to avoid the need to
+# shift the whole argument array. Attribute 'mail' is already listed
+# in pluginarg1, so it is conveniently used as valid value placeholder.
+dn: cn=7-bit check,cn=plugins,cn=config
+replace:nsslapd-pluginarg2:userpassword::mail

install/updates/Makefile.am

@@ -35,6 +35,7 @@ app_DATA =				\
 	40-automember.update		\
 	40-otp.update			\
 	45-roles.update			\
+	50-7_bit_check.update	        \
 	50-lockout-policy.update	\
 	50-groupuuid.update		\
 	50-hbacservice.update		\