net: link to crypt, not OpenSSL's crypto

There seems to be a confusion between crypt(3) and crypto(7) here.
The crypt function is defined in unistd.h and is used for password
and data encryption, while crypto is OpenSSL's library implementing
cryptographic algorithms used in Internet standards.

crypt  - https://www.unix.com/man-page/all/3C/crypt
crypto - https://www.openssl.org/docs/man1.1.1/man7/crypto.html

net/auth/CMakeLists.txt

@@ -21,13 +21,9 @@ ROOT_STANDARD_LIBRARY_PACKAGE(RootAuth
     src/TRootSecContext.cxx
   LINKDEF
     LinkDefRoot.h
-  LIBRARIES
-    ${CRYPTLIBS} rsa
   DEPENDENCIES
     Net
     RIO
 )
 
-if(ssl)
-  target_link_libraries(RootAuth PUBLIC ${OPENSSL_LIBRARIES})
-endif()
+target_link_libraries(RootAuth PRIVATE rsa $<$<PLATFORM_ID:Linux>:crypt>)

net/net/CMakeLists.txt

@@ -102,5 +102,5 @@ ROOT_STANDARD_LIBRARY_PACKAGE(Net
                               DEPENDENCIES RIO)
 
 if(ssl)
-  target_link_libraries(Net PRIVATE ${OPENSSL_LIBRARIES} ${CRYPTLIBS})
+  target_link_libraries(Net PRIVATE ${OPENSSL_LIBRARIES})
 endif()