ssize_t's for consistency, and add a few minor cosmetic fixes


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the fourth parameter to default to "no" (since it apparently only occurs
on glibc 2.2.3-based systems) so that cross-compiling will work


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routines to fix a few fundamental problems and limitations; also add
getline() and getdelim() equivalents adapted from GNU mailutils 0.5 (and
tweaked to better integrate with nano), since the patch uses getline()


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handle shorter screen widths better and display the filename using
display_string(), my strnlen() equivalent so the new titlebar() will
work on systems without strnlen(), and a few of DB's other minor changes
to make other display-related functions handle shorter screen widths
better, among other things


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greater readability, and remove unnecessary inclusion of stdio.h in the
slang tests


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space) all over the code, properly detect whether we have strcasestr()
and only use nstristr() if we don't, and bump up CVS build requirements
to account for setting _GNU_SOURCE when running the test programs for
both


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- Move code to src/.
- Move docs to doc/:
  + texi doc to doc/texinfo/
  + original manual pages to doc/man/
  + translated manual pages to doc/man/xx/


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miscellaneous cleanups, updates, and fixes


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configure.ac: - Added --enable-all option to compile in all the extra stuff we'd normally need extra flags for


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