* strdup is returning a malloced string which needs to be freed after use

> Direct leak of 90 byte(s) in 1 object(s) allocated from:
	> 0 0x7ffff745b9a7 in __interceptor_strdup ../../../../src/libsanitizer/asan/asan_interceptors.cpp:454
	> 1 0x5555591598a3 in main /executables/nr-softmodem.c:667
	> 2 0x7ffff5e29d8f in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58