liblib: Added negative %variable lengths to count backwards from the end of the value. For example %0.-2 for "12345" returns "123". Patch by Norbert Weinhold / Open-Xchange.
liblib: Added negative %variable lengths to count backwards from the end of the value.
For example %0.-2 for "12345" returns "123".
Patch by Norbert Weinhold / Open-Xchange.

dscho/dovecot,dscho/dovecot,dscho/dovecot,dscho/dovecot,dscho/dovecot