Another bunch of patches from John Hughes merged: signal.c: + SVR4 printcontext(): sigset_t != sigset_t* + getcontext returns a value, so print on exit of syscall + add UC_FP to ucontext_flags for OS writers that can't spell + sys_signal(): special case SIG_{ERR,DFL,IGN} + decode_subcall(): only do subcall range checking when needed bunch of UnixWare updates aclocal.m4, acconfig.h, configure.in: add test for long long type