Log Message:
Update to 3.5.11:

This minor maintenance release provides various build configuration
improvements and other janitorial cleanups, including declaring the
filename parameters in the API as "const char *" to reduce unnecessary
const-strings warnings in callers.

Adam Jackson (1):
      configure: Remove AM_MAINTAINER_MODE

Alan Coopersmith (4):
      Close fd if fdopen() or xpmPipeThrough() fails in OpenWriteFile()
      Add noreturn attributes suggested by gcc
      Fix typo in COPYING (matches src/amigax.h)
      libXpm 3.5.11

Christophe CURIS (2):
      Added 'const' qualifier to the filename argument to internal functions
      Added 'const' attribute to all filename arguments in the API

Claudio Bley (1):
      Fix libXpm build with NO_ZPIPE

Colin Walters (1):
      autogen.sh: Implement GNOME Build API

Eric S. Raymond (1):
      doclifter can't handle more than one dash in a name line.

Jon TURNEY (1):
      Define NO_ZPIPE when building for MinGW