[plug] answer: ldap auth + cyrus debian workaround

[Craig Ringer]

Hi folks

In case anybody ever needs to do this, if you get weird problems under 
debian while trying to use cyrus imapd to authentiate via PAM to an LDAP 
directory, there is a relatively simple - but non-obvious - fix.

Its apparently to do with some incompatabilities between 
libpam_ldap/libnss_ldap/libldap2 and libsasl1/libsasl2 - ugly stuff. 
Fixable by recompiling ldap not to use SASL (of course if you like your 
LDAP secure, this is a problem).

Errors I encountered that were related to this problem included:

	May 26 14:58:01 access master[29546]: process 29791 exited, signaled to 
death by 11
	a segfault in imtest
	auth.log:May 26 15:35:47 access saslauthd[32220]: AUTHFAIL: user=craig 
service=imap realm= [PAM auth error]

The quick fix: recompile libldap2 and friends not to use SASL.

# apt-get src libldap2
# cd openldap2-2.0.23
# vi debian/rules

s/--with-cyrus-sasl/--without-cyrus-sasl/
s/--enable-spasswd/--disable-spasswd/
s/--enable-sql/--disable-sql/

# debian/rules binary

then install the following .debs

Hope this saves someone else the hours of f**ing about this retarded bug 
cost me.

Craig