snmpstats: use $(share_prefix) for deploying MIBS

(cherry picked from commit 5dde71f7fb9715a18dabfe0beeb152b0821c6fb0)

Conflicts:
	modules/snmpstats/Makefile
ims_auth: Fix for SIP Digest (Segmentation fault)
- Fix by Marek Bazler (marek.bazler@acision.com)
ims_registrar_scscf: Fix memory corruption in build_contacts, in case no contacts available
snmpstats: fixed path for deploying mibs when net-snmp-config is used

(cherry picked from commit 777548d79f17a6eb81d241e18b22329e9654e951)
modules/sipt: optional pointer should be updated when modifying called party
(cherry picked from commit ed33effd4a65302cd893ef2e8f0f8fcc3e88fb57)
modules/tm: fixed bug where AVPs are not restored correctly if async used within failure route
	- related to mail by José Seabra on Jan 10 2014 entitiled - kamailio-4.1.1 avp issue within failure routes

(cherry picked from commit f3f2f09beda60e1f7f4e6dfc0359f788991aeef6)
xhttp_rpc: fix arg parsing
(cherry picked from commit 3615f3c26405f1c1bcd3721674e9d87e4b589146)
dispatcher: updated example config to use new db url attributes

(cherry picked from commit a248b53249d76e6b53f72bc64acd4c14fb5db660)
dispatcher: more details on how destination select functions work

(cherry picked from commit f210c266311498393b93d66b41e8c08d89cbc731)
dispatcher: readme regenerated with new sameple config and sections content
gzcompress: fixed info about header_value parameter in docs

(cherry picked from commit cbd525649237c3beb05ad7bcb38969fb3629b90e)