Revert "Move IPADDRESSES to the EvalContext struct"

This reverts commit 6d7360fba7bf855b672ec2f0a9443978d7cafa22.
Revert "Don't use IPADDRESSES in cf-execd-runner subprocess"

This reverts commit d64c8f7612a5c91bd2fe0c73be9b00d19835673f.
Revert "Don't use global IPADDRESSES in addr_lib"

This reverts commit 00ed4d6b96a56b614d596e43b74471a07ec8edca.
contrib/cfengine-code-style.el: Fix file header and footer lines for ELPA compatibility

- Fix header line
- Add footer line
- Add Commentary section
- Add Code section
- Change semicolons of header comment lines from three to two
Merge pull request #1172 from yasuyk/fix-for-elpa

contrib/cfengine-code-style.el: Fix file header and footer lines for ELPA compatibility
Merge pull request #1166 from cduclos/queue-implementation

General libutils modifications and adding Queue
sysinfo: give group, comment, and derived-from tags.  Remove goal= tags.
Merge pull request #1165 from tzz/feature/redmine3283-tag-everything-n-stuff

sysinfo: give classes and variables: group, comment, and derived-from tags
fix Queue unit tests since queue->queue was removed
Merge pull request #1175 from tzz/master

fix Queue unit tests since queue->queue was removed
Redmine#3283: add group=Network tag to network-related classes and variables
Merge pull request #1176 from tzz/master

Redmine#3283: add group=Network tag to network-related classes and varia...
Move TimeAbs2Int to the place of use
Move Months2Seconds to the place of use
Move Day2Number to the place of use
Remove unused global variable
Remove unused CFINITSTARTTIME and associated code
Move CFLOCK to the place where it is used
Move CF_LOCKHORIZON to the place of use
Remove unreachable trust-checking code and associated machinery

There used to be a time when cf-serverd checked IP reported by the
client and did some trust calculations based on that (including
denying connections from NATed hosts, because NATed hosts didn't
know their IP address as it is seen from cf-serverd side).

In order to overcome NAT issue "skipverify" option has been introduced, to
exclude some IPs/networks from IP/DNS lookup checks.

In CFEngine 3.0 this code became unreachable and stayed like this until today,
and nobody noticed. Hence, it's safe to remove it and deprecate "skipverify"
option.