c3ff4648 removed the [iaxtel700] context but neglected to remove
references to it.
This commit addresses that and also removes iaxtel and freeworlddialup
references from other config files.
(cherry picked from commit f389d5d4b5)
Correct typos of the following word families:
password
excludes
undesirable
checksums
through
screening
interpreting
database
causes
initiation
member
busydetect
defined
severely
throughput
recognized
counter
require
indefinitely
accounts
ASTERISK-29714
Change-Id: Ie8f2a7b274a162dd627ee6a2165f5e8a3876527e