* Fix FD_SET overflow when socket fd >= FD_SETSIZE.
* Check dest pointer not null and nb in read functions.
* NULL check for src and nb < 1 validation in write functions.
* modbus_reply: don't compute address for FC 0x07/0x11.
* Use O_NONBLOCK instead of deprecated O_NDELAY (closes#710).
* Explicit cast for Coverity CID 416366.
* Document required buffer size of modbus_receive.
* Document macros for error codes corresponding to Modbus
exceptions (#758).
* Fix example of modbus_rtu_set_serial_mode (closes#552).
* Test filesystem provides symlink in autogen.sh (closes#414).
* Sync API signatures with the documentation.
* Many documentation fixes and typo corrections.
OBS-URL: https://build.opensuse.org/package/show/hardware/libmodbus?expand=0&rev=11
