Avoid using gets (...at all) on recent glibc.

Because "gets is a security hole - use fgets instead" and this function is not
available anymore in recent environments.

Also depend on patch change, as it shall lead to recompilation.

component/tar/buildout.cfg

@@ -2,7 +2,19 @@
 
 parts = tar
 
+[tar-drop.gets.patch]
+recipe = hexagonit.recipe.download
+url = ${:_profile_base_location_}/${:filename}
+md5sum = 9352820566aa3534a04bd269c9f89f48
+download-only = true
+filename = drop.gets.patch
+
 [tar]
+virtual-depends = ${tar-drop.gets.patch:md5sum}
+patch-options = -p1
+patches =
+  ${tar-drop.gets.patch:location}/${tar-drop.gets.patch:filename}
+
 recipe = hexagonit.recipe.cmmi
 url = http://ftp.gnu.org/gnu/tar/tar-1.26.tar.gz
 md5sum = 00d1e769c6af702c542cca54b728920d

component/tar/drop.gets.patch

+diff -ur tar-1.26.orig/gnu/stdio.in.h tar-1.26/gnu/stdio.in.h
+--- tar-1.26.orig/gnu/stdio.in.h	2011-03-12 10:14:33.000000000 +0100
++++ tar-1.26/gnu/stdio.in.h	2012-08-24 15:35:22.299190847 +0200
+@@ -164,7 +164,10 @@
+    so any use of gets warrants an unconditional warning.  Assume it is
+    always declared, since it is required by C89.  */
+ #undef gets
++#if defined(__GLIBC__) && !defined(__UCLIBC__) && !__GLIBC_PREREQ(2, 16)
+ _GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
++#endif
++
+ 
+ #if @GNULIB_FOPEN@
+ # if @REPLACE_FOPEN@