Arrange that, on Solaris, we link with "-lkstat" if necessary when

Arrange that, on Solaris, we link with "-lkstat" if necessary when
linking with "-lsnmp".

Link only Ethereal and Tethereal with "-lpcap"; don't link editcap, or
any of the test programs that the configure script builds, with it
(because that means you also have to arrange that those test programs be
linked with @SOCKET_LIBS@ and @NSL_LIBS@) - i.e., don't add it to LIBS,
add it to PCAP_LIBS, and use that only for programs that need it.

svn path=/trunk/; revision=1484