Misc minor fixes in reqresp_parser.c and chan_sip.c.

* Fix corner cases in get_calleridname() parsing and ensure that the
output buffer is nul terminated.

* Make get_calleridname() truncate the name it parses if the given buffer
is too small rather than abandoning the parse and not returning anything
for the name.  Adjusted get_calleridname_test() unit test to handle the
truncation change.

* Fix get_in_brackets_test() unit test to check the results of
get_in_brackets() correctly.

* Fix parse_name_andor_addr() to not return the address of a local buffer.
This function is currently not used.

* Fix potential NULL pointer dereference in sip_sendtext().

* No need to memset(calleridname) in check_user_full() or tmp_name in
get_name_and_number() because get_calleridname() ensures that it is nul
terminated.

* Reply with an accurate response if get_msg_text() fails in
receive_message().  This is academic in v1.8 because get_msg_text() can
never fail.
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Merged revisions 351618 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 351646 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@351667 65c4cc65-6c06-0410-ace0-fbb531ad65f3