Reorganize iproto parser (pickle) around two pointers at the request
parsing position and request end.
This makes the code more generic and easily usable in lua and
with new buffered I/O.

This also reduces the current widespread use of tbuf throughout
entire code base (good for future maintainability of the code).

When server wrapper script failed to start
the server, it used to try to send a email
to somebody about this. This has never been
tested, nor used.

At least make sure it works when it does try
to do it.

twistd by default starts with umask 077.
This is why buildbot has umask setting.

rpm by default takes file and directory umask
from the build directory.

When building tarantool rpm under buildbot,
twistd default umask was inherited. Thus
all paths were created in rwx-- mode.

Now add to this cmake bug CMake bug 0012864.
That is, by default, cmake cpack generator
adds %dir directive for every intermediate
dir into the spec.

E.g. if there is a destination file /etc/rc.d/foo,
the spec gets
%dir /etc
%dir /etc/rc.d

Together with the default dir access mask of
twistd this nicely messed up our rpm install: an
install of Tarantool 1.4.8-59 rpm for CentOS would change
/etc and /usr access mode to 700.

Two things are done about that: Tarantool no longer
uses a cpack generated cpeck file. Extraneous %dir
directives are removed from the spec file. This
should minimize the damage of a broken twistd config,
should it happen again.

All buildslaves are reconfigured and restarted with umask 022.

A just-connected session would get stuck not reading input
if only a part of request was received.

-H add headers to the raw format output (xlog and snapshot)
-I read xlog content from the stdin

Conflicts:
	test/big/tarantool.cfg

address detection to sendto.

Conflicts:
	test/box/lua.result

Conflicts:
	test/box/lua.result
	test/box/lua.test

it's uncertain which address bind/connect will choose when
connection to localhost. The problem is with /etc/hosts
which can contain bindings for both 127.0.0.1 and ::1 for
localhost (and some system don't).

See for futher explanation:
http://sourceware.org/bugzilla/show_bug.cgi?id=4980

Conflicts:
	test/box/lua.result

Conflicts:
	src/box/box_lua.m

Conflicts:
	test/big/tarantool.cfg

- auto_increment key start from '1' now

Conflicts:

	test/big/tarantool.cfg

https://bugs.launchpad.net/tarantool/+bug/1131755

(A tip from Alexey Kapitansky).

Don't pollute test/unit include space with
third_party includes.

Correctly convert lsn to ulonglong, correctly
evaluate --from and --to range.

https://bugs.launchpad.net/tarantool/+bug/1119389