Optional version and uri, no Std copy, reuse deps, jbb libc check

tests/libssh2.nim

@@ -6,7 +6,7 @@ const
 getHeader(
   header = "libssh2.h",
   conanuri = "libssh2/$1",
-  jbburi = "libssh2/$1",
+  jbburi = "libssh2/1.9.0",
   outdir = outdir
 )
 
@@ -45,6 +45,3 @@ echo "zlib version = " & (block:
   else:
     ""
 )
-
-static:
-  echo libssh2LDeps

tests/lzma.nim

@@ -24,6 +24,8 @@ getHeader(
   "lzma.h",
   giturl = "https://github.com/xz-mirror/xz",
   dlurl = "https://tukaani.org/xz/xz-$1.tar.gz",
+  conanuri = "xz_utils",
+  jbburi = "xz",
   outdir = baseDir,
   conFlags = "--disable-xz --disable-xzdec --disable-lzmadec --disable-lzmainfo"
 )

tests/zlib.nim

@@ -27,8 +27,6 @@ getHeader(
   "zlib.h",
   giturl = "https://github.com/madler/zlib",
   dlurl = "http://zlib.net/zlib-$1.tar.gz",
-  conanuri = "zlib/$1",
-  jbburi = "zlib/$1",
   outdir = baseDir,
   altNames = "z,zlib"
 )