Include ctype.h in odbcserver.c for tolower()

odbcserver.c:2772:12: warning: implicit declaration of function 'tolower' is invalid in C99
      [-Wimplicit-function-declaration]
                str[i] = tolower(str[i]);
                         ^
odbc: Fix configure check to work proparly on windows
Merge remote-tracking branch 'upstream/maint'
Prepare release
Merge tag 'OTP_R16B03-1'

The R16B03-1 release