Major changes to not depend on cksum and db from NetBSD.

Two new utilities in C have been created:
	- xbps-digest: shows the SHA256 hash for a file.
	- xbps-pkgdb: handles dependency stuff via proplib.

Templates should use now $build_depends and change $checksum to be
a SHA256 hash. That means that I'm currently using xbps on Linux and
I lost interest on NetBSD, perhaps I'll add support for it in the
future.

Only git and its dependencies have been converted, as well as vim.

--HG--
extra : convert_revision : 53a7e030ca6b6d02bb6cd3e51d42b7d5702c1b57

templates/curl.tmpl

@@ -7,7 +7,7 @@ configure_args="--enable-ldaps"
 pkgconfig_override="libcurl.pc"
 short_desc="Client that groks URLs"
 maintainer="Juan RP <xtraeme@gmail.com>"
-checksum=2849e82496eb19bd75792d64f42eaa196e1ebac3
+checksum=a0e28b019f022942650ffa4bdf46e4c09bd8ec18e6ca5f08ad273668115f51f7
 long_desc="
  Curl is a command line tool for transferring files with URL syntax, supporting
  FTP, FTPS, HTTP, HTTPS, GOPHER, TELNET, DICT, FILE and LDAP. Curl supports
@@ -15,3 +15,5 @@ long_desc="
  proxies, cookies, user+password authentication (Basic, Digest, NTLM, Negotiate,
  kerberos...), file transfer resume, proxy tunneling and a busload of other
  useful tricks."
+
+build_depends="libidn-1.9"