http: Declare more parameters as const where possible

Signed-off-by: Martin Storsjö <martin@martin.st>
update doc/APIchanges

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
configure: Group toolchain options together in help output
copy_block: K&R formatting cosmetics
configure: Support older version of openjpeg1

It should work best for debian stable and people not installing the .pc
file.
armv6: vp8: use explicit labels in motion compensation asm

The integrated arm assembler in clang-503.0.38 (Xcode-5.1) fails
to assemble a branch to 'label + offset' in thumb mode.
doc: Point to the correct, actually maintained gas-preprocessor repo

Signed-off-by: Martin Storsjö <martin@martin.st>
Merge commit 'e77a2ea9505863e50bf013706f66bf8b7325e524'

* commit 'e77a2ea9505863e50bf013706f66bf8b7325e524':
  http: Declare more parameters as const where possible

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'b3c6ee199e75bbad2908253f11e871500dd38531'

* commit 'b3c6ee199e75bbad2908253f11e871500dd38531':
  configure: Group toolchain options together in help output

Conflicts:
	configure

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'b4e355c89e23664b8dac26936bf3fa7e7bc2110f'

* commit 'b4e355c89e23664b8dac26936bf3fa7e7bc2110f':
  copy_block: K&R formatting cosmetics

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'aa807425395caa17a85ed2833133278e8bd44a76'

* commit 'aa807425395caa17a85ed2833133278e8bd44a76':
  configure: Support older version of openjpeg1

Conflicts:
	configure

Not merged as the problematic pkg config code wasnt merged

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '5a7f382a5d33d9a26890affe6c8c5070a48dfc22'

* commit '5a7f382a5d33d9a26890affe6c8c5070a48dfc22':
  armv6: vp8: use explicit labels in motion compensation asm

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'd15c536123a44362ace6299c391a492c90b83fc7'

* commit 'd15c536123a44362ace6299c391a492c90b83fc7':
  doc: Point to the correct, actually maintained gas-preprocessor repo

Conflicts:
	doc/platform.texi

Merged-by: Michael Niedermayer <michaelni@gmx.at>
doc: switch github urls to https

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
tools/build_libstagefright: switch git urls to https

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
doc/platform: mention that yuvis gas-preprocessor is currently missing some changes

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>