Update for 13.21.0-rc1

.lastclean

.version

ChangeLog

asterisk-13.21.0-rc1-summary.html

asterisk-13.21.0-rc1-summary.txt

contrib/realtime/mssql/mssql_cdr.sql

contrib/realtime/mssql/mssql_config.sql

contrib/realtime/mssql/mssql_voicemail.sql

contrib/realtime/mysql/mysql_cdr.sql

contrib/realtime/mysql/mysql_config.sql

contrib/realtime/mysql/mysql_voicemail.sql

contrib/realtime/oracle/oracle_cdr.sql

contrib/realtime/oracle/oracle_config.sql

contrib/realtime/oracle/oracle_voicemail.sql

contrib/realtime/postgresql/postgresql_cdr.sql

contrib/realtime/postgresql/postgresql_config.sql

contrib/realtime/postgresql/postgresql_voicemail.sql