master updated (6ce957154b7 -> 75278855f4a)

[Jim Porter]

jporter pushed a change to branch master.

      from  6ce957154b7 Redo erc-nickname-in-use-functions as a local module
       new  194de36ca9f ; * doc/misc/eshell.texi (Bugs and ideas): Remove 
implemented feature.
       new  f2981a1681d Restructure Eshell extension modules documentation
       new  77f13edab0f Correct the Eshell documentation about how to write new 
modules
       new  75278855f4a Document optional Eshell modules


Summary of changes:
 doc/misc/eshell.texi     | 281 ++++++++++++++++++++++++++++-------------------
 lisp/eshell/em-rebind.el |  19 ++--
 2 files changed, 176 insertions(+), 124 deletions(-)