Fix Lerberos detection on different Solaris versions and Linux,
examle update from pgsql see here:
https://projects.commandprompt.com/public/pgsql/changeset/28598#file1

This does not mean that kerneros support would build in the
imap toolkit because it seems to have -lgssapi_krb5 hard-coded.
Anyway the configure is improvied with this patch.

Also SSL detection is adapted, there is no need to have LIBS="$LIBS -lssl"
there because when reading the documentation of AC_SEARCH_LIBS, one
knows that that is done by AC_SEARCH_LIBS automatically. If SSL
is not found, it should also be turned off, possibly, or
maybe an AC_MSG_ERROR might be better instead. YMMV - that
part is not in need to be touched but looks better that way.

--- alpine-0.999/configure.ac	2007-06-28 00:48:15.000000000 +0000
+++ alpine-0.999/configure.ac	2007-08-01 17:24:13.000000000 +0000
@@ -588,6 +588,8 @@
     [
       if test "x$withval" != "xno" ; then
 	alpine_GSSDIR=$withval
+	CPPFLAGS="$CPPFLAGS -I${withval}/include"
+	AM_LDFLAGS="$AM_LDFLAGS -L${withval}/lib"
       fi
     ])
 
@@ -596,6 +598,7 @@
     [
       if test "x$withval" != "xno" ; then
 	alpine_GSSINCLUDE=$withval
+	CPPFLAGS="$CPPFLAGS -I${withval}/include"
       fi
     ])
 
@@ -604,6 +607,7 @@
     [
       if test "x$withval" != "xno" ; then
 	alpine_GSSLIB=$withval
+	AM_LDFLAGS="$AM_LDFLAGS -L${withval}/lib"
       fi
     ])
 fi
@@ -797,31 +801,21 @@
 if test "x$alpine_SSLTYPE" != "xnone" ; then
   AC_SEARCH_LIBS(SSL_library_init,ssl,
     [
-      LIBS="$LIBS -lssl"
+      AC_MSG_NOTICE([OpenSSL libraries FOUND])
+    ],
+    [
+      AC_MSG_NOTICE([OpenSSL libraries NOT found])
+      alpine_SSLTYPE=none
     ])
-  if test "x$alpine_SSLTYPE" = "xnone" ; then
-    AC_MSG_NOTICE([OpenSSL libraries NOT found])
-  else
-    AC_MSG_NOTICE([OpenSSL libraries FOUND])
-  fi
 fi
 
 dnl provide KRB5 support?
 if test "x$alpine_GSSTYPE" != "xnone" ; then
-  case x$alpine_GSSLIB in
-    x)
-      AC_SEARCH_LIBS(gss_init_sec_context,$alpine_GSSLIB,,
-	[
-	  alpine_GSSTYPE="none"
-	])
-     ;;
-    *)
-      AC_CHECK_FUNC(gss_init_sec_context,,
-	[
+    AC_SEARCH_LIBS(gss_init_sec_context, [gssapi_krb5 gss 'gssapi -lkrb5 -lcrypto'], [],
+      [
+	  AC_MSG_NOTICE([Kerberos5 libraries NOT found!!!])
 	  alpine_GSSTYPE="none"
-	])
-     ;;
-  esac
+      ])
 fi
 
 dnl check for tcl libraries for Web Alpine