Incomplete beta function moved to a .m file, fixing accuracy and input validation (see bugs #51157 and #34405). It's inverse also has been rewritten as .m file. -- added libinterp/corefcn/__betainc_lentz__.cc added scripts/specfun/betainc.m added scripts/specfun/betaincinv.m changed libinterp/corefcn/module.mk changed liboctave/external/slatec-fn/module.mk changed liboctave/numeric/lo-specfun.cc changed liboctave/numeric/lo-specfun.h changed scripts/specfun/module.mk changed scripts/statistics/distributions/betainv.m changed scripts/statistics/distributions/binocdf.m removed libinterp/corefcn/betainc.cc removed liboctave/external/slatec-fn/betai.f removed liboctave/external/slatec-fn/dbetai.f removed liboctave/external/slatec-fn/xbetai.f removed liboctave/external/slatec-fn/xdbetai.f

EXTERNAL_SOURCES += \
  %reldir%/albeta.f \
  %reldir%/alngam.f \
  %reldir%/alnrel.f \
  %reldir%/algams.f \
  %reldir%/csevl.f \
  %reldir%/d9gmit.f \
  %reldir%/d9lgic.f \
  %reldir%/d9lgit.f \
  %reldir%/d9lgmc.f \
  %reldir%/dcsevl.f \
  %reldir%/dgamlm.f \
  %reldir%/dgamma.f \
  %reldir%/dgamr.f \
  %reldir%/dlbeta.f \
  %reldir%/dlgams.f \
  %reldir%/dlngam.f \
  %reldir%/dlnrel.f \
  %reldir%/dpchim.f \
  %reldir%/dpchst.f \
  %reldir%/dpsifn.f \
  %reldir%/gamlim.f \
  %reldir%/gamma.f \
  %reldir%/gamr.f \
  %reldir%/initds.f \
  %reldir%/inits.f \
  %reldir%/pchim.f \
  %reldir%/pchst.f \
  %reldir%/psifn.f \
  %reldir%/r9lgmc.f \
  %reldir%/r9lgit.f \
  %reldir%/r9gmit.f \
  %reldir%/r9lgic.f

DIRSTAMP_FILES += %reldir%/$(octave_dirstamp)