A header, 'prlink.h', caused compiler warnings when it was included in an application built with the strict prototype checking enabled (i.e. when "-Wstrict-prototypes" was included in the 'CFLAGS'). If such warnings were treated as errors in the compiler flags (i.e. if "-Werror" was used), the affected application would not compile. The affected applications did not, in fact, need 'prlink.h', they were including it indirectly via another header. This update fixes the header so that it does not expose the faulty header and enables nss client software to build with strict prototype checking enabled, as expected.