[make-initrd] Release libshell 0.5.0

[Alexey Gladkov]

New release 0.5.0 is available.

I'm posting the announcement about the release of libshell here because
make-initrd and libshell are closely related.

# Important changes

- shell-ip-address:
  + Added ipv6_addr_type. This function interprets the given option value
    as an IPv6 address similarly to inet_pton(3).
  + Added ipv4_ptonx, ipv6_ptonx. These functions takes a string
    representation of an IP address and prints out its raw, network
    byte order representation as a sequence of hexadecimal octets.
  + Added ipv6_ip_matches. This function takes two arguments, an IPv6
    address and a prefix with length, and checks that this address is in
    this prefix.

- shell-string:
  + Added special optimization for character-by-character iteration over
    a string. The optimization only works on some shell implementations
    (bash, ksh).

- shell-quote:
  + Added quote_grep_regexp, quote_grep_regexp_variable. These functions
    are necessary for correct quoting of regular expressions for GNU
    grep 3.11 or higher.

- shell-bitwise:
  + Added functions to operate with bits. This is a set of functions for
    manipulating individual bits in a number.

# Git repository

https://github.com/legionus/libshell/releases/tag/v0.5.0

As always, feedback and bug reports are welcome.

-- 
Rgrds, legion