Coverity CID #1222259
More fixes for Betriebssystemschwein

Set _X_OPEN_SOURCE=600 and -std=c99 earlier so that ./configure runs against appropriate versions of the POSIX APIs.

Fix rlm_krb5 configure script to correctly detect that Betriebssystemschwein's libkrb5 is based on MIT's

Include fcntl.h in log.c, this should probably always of been included...

Add alternative names for macros in rlm_ldap/ldap.h and #ifdef out a few lines of code, as starttls doesn't seen to be available...
Hmm, setting _X_OPEN_SOURCE breaks everything
Not every LDAP library supports setting Network Timeout
Formatting
Add TALLOC_CTX to RADIUS protocol decoder. We're not always allocating in the context of a packet.

Fixes #668

Also fixes potential threading issues in EAP-TTLS
Fix horrific formatting in EAP-PWD
VPs are allocated in the packet CTX, not the request
Don't stop parsing on padding options
We no longer need to artificially limit the size of DHCP options to 253 bytes

Dynamically allocated value buffers FTW
DHCP-Client-Identifier and DHCP-Vendor-Class-Identifier should both be octets types
Remove DHCP Client Identifier hack, this can, and should, be done in policy.
Relax DHCP sub-option parser slightly
Formatting
Whitespace
EAP Sim code should use PW_EAP_* definitions instead of ATTRIBUTE_EAP_SIM_*
Search for the correct alternative attributes...
More EAP attribute definitions which should have been converted
Fix error message.  Closs #683
Let client response windows override init_delay

Allow client's response_window lower than main_config.init_delay to
override it. This allows initial request processing delay to track
client response windows, in addition to home server response windows.