Update for dhcp.openSUSE_Evergreen_11.4 security moderate

dhcp: fixed remote denial of service attack

The ISC dhcp server was updated to fix a denial of service attack via regular
- Removed regex.h check from configure in bind sources (bnc#811934,CVE-2013-2266). Make the bind export library build output visible.

Also fixed:
- Added dhcp6-server service template for SuSEfirewall2 (bnc#783002)
- Applied a patch to ignore SIGPIPE instead to die in socket code before the errno==EPIPE checks are reached (bnc#794578, upstream report [ISC-Bugs #32222])
- Applied several obvious memleak and segfault fixes from 4.2.5rc1 and a correction of code to calculate timing values in dhcpv6 client to compare rebind value to infinity instead of renew(bnc#794578).
- Fixed discovery of interfaces, which have only addresses with a label assigned (linux 2.0 "alias interfaces" compatibility) by switching to use the getifaddrs() as on BSD (bnc#791289, reported upstream as [ISC-Bugs #31992]).
- Fixed parse buffer handling code to not avoid truncation of config > ~8k from bigger ldap objects. Fixed to free the ldap config buffer passed to the config parser and append new config, while the parser is in saved state (bnc#788787).
- Fixed subclass name-ref and data quoting/escaping (bnc#788787).
- Fixed memory leaks on ldap_read_config errors (bnc#788787).
- Fixed dhclient-script to discard MTU lower-equal 576 rather than lower-than (bnc#791280).
- dhcp-ldap: fixed a memleak while subnet range processing, fixed to reset bufix variable in ldap_read_function to 0 and to set buflen to the complete length (do not discard last character, usually \n). This caused a parsing error at further run of the function, e.g. while processing the second dhcpService container that the dhcpServer objectmay refer to (bnc#784640).

Fixed bugs
Standard firewall blocks IPv6 UDP ports 546 and 5353
DHCP Server fails to start up if more than one Services are associated with it.
dhcpd truncates dhcpStatements attribute to circa 8K when loading the configuration from LDAP
MTU only at 576 with cable internet provicer via dhcp (eth0) - regression in iscdhcpclient?
dhcpd 4.x fails to start with error "Not configured to listen on any interfaces!" when only an alias interface has been configured
ISC dhcpd dies with SIGPIPE
VUL-0: CVE-2013-2266: dhcp: DHCP 4.2.5-P1 update to fix one security issue
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