* sldisply.c (SLtt_initialize): Fix typo. Change Is_Bg_BGR

    * sldisply.c (SLtt_initialize): Fix typo. Change Is_Bg_BGR
        to Is_Fg_BGR.  (SLtt_goto_rc): Disable cursor movement optimizations
        for qansi-m consoles. Needed on QNX Neutrino. (SLtt_initialize): Init
        QANSI_Console variable. (SLtt_erase_line): Use tt_write() instead
        tt_write_string(). (SLtt_cls): Use tt_write() instead tt_write_string().
        (SLtt_tgetstr): Fix warning.
        * slmisc.c: Trimmed down for use in GNU Midnight Commander.
        * sltermin.c (_pSLtt_tigetent): Avoid strncpy, home_ti is 1K long and
        obody really needs it whole cleared. Fix possible off-by-one error.
        * include/slang.h: Define __unix__ if __MACH__, __NetBSD__,  _AIX is
        defined.