This backports a patch from upstream radsecproxy to fix compilation with glibc 2.34.
It fixes the following build problem:
radsecproxy.h:35:5: error: missing binary operator before token "("
35 | #if PTHREAD_STACK_MIN > PTHREAD_STACK_SIZE
| ^~~~~~~~~~~~~~~~~
make[5]: *** [Makefile:623: dtls.o] Error 1
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>