xpr 1.2.0

• Use memcpy() instead of memmove() when buffers are known not to overlap
• Remove unnnecessary casts from malloc(), calloc(), and free() calls
• No need to bzero() buffers allocated by calloc()
• Add support for paper sizes other than 8.5 x 11 inches
• gitlab CI: stop requiring Signed-off-by in commits
• Modernize lseek() calls
• configure: Use AC_SYS_LARGEFILE to enable large file support
• xpr 1.2.0