Move all libs but libvarnishapi to a private directory, drop soname number

As we don't want anybody linking against libvarnish, libvcl and the
other libraries, move those to pkglibdir.  In addition, to further
emphasize that they do not have a stable ABI, drop the version from
the soname.

lib/libvarnish/Makefile.am

@@ -2,9 +2,9 @@
 
 INCLUDES = -I$(top_srcdir)/include @PCRE_CFLAGS@
 
-lib_LTLIBRARIES = libvarnish.la
+pkglib_LTLIBRARIES = libvarnish.la
 
-libvarnish_la_LDFLAGS = -version-info 1:0:0
+libvarnish_la_LDFLAGS = -avoid-version
 
 libvarnish_la_SOURCES = \
 	argv.c \

lib/libvarnishcompat/Makefile.am

@@ -2,9 +2,9 @@
 
 INCLUDES = -I$(top_srcdir)/include
 
-lib_LTLIBRARIES = libvarnishcompat.la
+pkglib_LTLIBRARIES = libvarnishcompat.la
 
-libvarnishcompat_la_LDFLAGS = -version-info 1:0:0
+libvarnishcompat_la_LDFLAGS = -avoid-version
 
 libvarnishcompat_la_SOURCES = \
 	daemon.c \

lib/libvcl/Makefile.am

@@ -2,9 +2,9 @@
 
 INCLUDES = -I$(top_srcdir)/include -I$(top_builddir)/include
 
-lib_LTLIBRARIES = libvcl.la
+pkglib_LTLIBRARIES = libvcl.la
 
-libvcl_la_LDFLAGS = -version-info 1:0:0
+libvcl_la_LDFLAGS = -avoid-version
 
 libvcl_la_SOURCES = \
 	vcc_priv.h \

lib/libvgz/Makefile.am

 # $Id$
 
-lib_LTLIBRARIES = libvgz.la
+pkglib_LTLIBRARIES = libvgz.la
 
-libvgz_la_LDFLAGS = -version-info 1:0:0
+libvgz_la_LDFLAGS = -avoid-version
 libvgz_la_CFLAGS = -D_LARGEFILE64_SOURCE=1 $(libvgz_extra_cflags)
 
 libvgz_la_SOURCES = \