Bug#1006456: transition: openldap

[Ryan Tandy]

collectd and monitoring-plugins should be rebuilt as well. They are 
showing as unknown in the tracker because they list their plugins' shlib 
dependencies in Suggests and Recommends respectively. Sorry it didn't 
occur to me to list those fields in the ben file.

sogo is probably ok. It depends on libldap-dev because it uses a couple 
of constants from <ldap.h>, but it doesn't seem to link -lldap itself, 
instead relying on libsope1 to link it transitively.