[PATCH v3 0/6] Add some string_list-related functions

Version 3 of a patch series that adds some functions to the string_list API. This patch series applies to current master. Thanks for Junio for lots of great feedback.

The patch series "Clean up how fetch_pack() handles the heads list" v3, which requires some of the new string_list functionality, works unmodified on top of this version of the patch series.

Changes since v2:

* Use "if (!...) die(...)" instead of assert() to check function
  preconditions.

* Remove unneeded cast.

* Fix formatting of api documentation.

Michael Haggerty (6):
  string_list: add function string_list_append_nodup()
  string_list: add two new functions for splitting strings
  string_list: add a new function, filter_string_list()
  string_list: add a new function, string_list_remove_duplicates()
  string_list: add a function string_list_longest_prefix()
  api-string-list.txt: initialize the string_list the easy way

 .gitignore                                  |   1 +
 Documentation/technical/api-string-list.txt |  68 +++++++++++++--
 Makefile                                    |   1 +
 string-list.c                               | 127 ++++++++++++++++++++++++++--
 string-list.h                               |  71 ++++++++++++++++
 t/t0063-string-list.sh                      | 121 ++++++++++++++++++++++++++
 test-string-list.c                          | 123 +++++++++++++++++++++++++++
 7 files changed, 502 insertions(+), 10 deletions(-)
 create mode 100755 t/t0063-string-list.sh
 create mode 100644 test-string-list.c