This is needed for older compilers (like Wheezy's gcc 4.7.2 and Jessie's
gcc 4.9.2) to accept "modern" things like for-loops with the index
variable declared in them:

hostmot2.c:759:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for (int i = 0; i < num_pins; i ++) {
      ^
hostmot2.c:759:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code

This also means we no longer need to override CFLAGS in the travis config.

Make sure the requested filename fits in the `bitfile_name` buffer before
copying it.

This squelches a warning from -D_FORTIFY_SOURCE.

Make sure there's room in the destination buffer for the whole source
string, plus the terminating NULL.

Error out early and print a helpful error message if they're not found.

This makes the `if` statement bodies indent by 4 spaces instead of
sometimes one tab and sometimes nothing.

changes from jethornton/mesaflash master branch

fix a couple of compile warnings

* origin/v3.3:
  read-hmid: report unknown pins better
  hm2_print_pin_file(): use find_module_name() instead of searching the list
  rename pin_find_module_name() to find_module_name()
  include gtag number of unknown gtags in pin list
  remove dead code
  7i96: fixup pins per connector
  don't segfault on unknown ethernet boards
  fix a typo in a comment
  fix SSR pin names
  fix sserial channel number in readhmid pin list
  rename the "Transformer" GTAG to "SSR", to match the linuxcnc hm2 driver
  7i96: make the connector list match the ioport list
  capitalize Ethernet consistently in --help message
  fix addr argument for ethernet boards in --help message
  consistent capitalization and punctuation in --help output
  fix formatting of --help output
  release 3.3.0~pre0+dfsg-0
  release mesaflash 3.2.1
  debian/changelog: new version
  pci_analog_write: include unistd.h, which declares usleep()
  sserial_module: declare sserial_write(), used by pci_analog_write
  pci_encoder_read: include unistd.h, for usleep()
  serial_boards: add some missing declarations
  spi_boards: include unistd.h
  spi_boards: include ctype.h
  add missing return value in spi_boards_init()
  spi_boards: include eeprom.h
  eeprom_local: include pci/pci.h
  hostmot2: add some missing function declarations
  pci_boards: move pci_read() and pci_write() to before the first use in the file
  pci_boards: include sys/time.h
  anyio: include missing serial_boards.h
  include bitfile.h in eeprom.c, for print_bitfile_header()
  function declarations shouldn't be marked inline

Fix -Wstringop-truncation warnings

Add sys/io.h stubs implementation

Fix linking errors

Fix compilation errors

Fix -Wformat warning

Make packaging easier

Fix misleading indentation warnings