Documentation/technical: convert plain text files to asciidoc

These were not originally meant for asciidoc, but they are already
so close.  Mark them up in asciidoc.

Signed-off-by: Thomas Ackermann <th.acker@arcor.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/technical/index-format.txt

@@ -1,7 +1,7 @@
 GIT index format
 ================
 
-= The git index file has the following format
+== The git index file has the following format
 
   All binary numbers are in network byte order. Version 2 is described
   here unless stated otherwise.

Documentation/technical/pack-format.txt

@@ -1,7 +1,7 @@
 GIT pack format
 ===============
 
-= pack-*.pack files have the following format:
+== pack-*.pack files have the following format:
 
    - A header appears at the beginning and consists of the following:
 
@@ -34,7 +34,7 @@ GIT pack format
 
   - The trailer records 20-byte SHA1 checksum of all of the above.
 
-= Original (version 1) pack-*.idx files have the following format:
+== Original (version 1) pack-*.idx files have the following format:
 
   - The header consists of 256 4-byte network byte order
     integers.  N-th entry of this table records the number of
@@ -123,8 +123,8 @@ Pack file entry: <+
 
 
 
-= Version 2 pack-*.idx files support packs larger than 4 GiB, and
-  have some other reorganizations.  They have the format:
+== Version 2 pack-*.idx files support packs larger than 4 GiB, and
+   have some other reorganizations.  They have the format:
 
   - A 4-byte magic number '\377tOc' which is an unreasonable
     fanout[0] value.

Documentation/technical/pack-protocol.txt

@@ -117,7 +117,7 @@ A few things to remember here:
 - The repository path is always quoted with single quotes.
 
 Fetching Data From a Server
-===========================
+---------------------------
 
 When one Git repository wants to get data that a second repository
 has, the first can 'fetch' from the second.  This operation determines
@@ -134,7 +134,8 @@ with the object name that each reference currently points to.
 
    $ echo -e -n "0039git-upload-pack /schacon/gitbook.git\0host=example.com\0" |
       nc -v example.com 9418
-   00887217a7c7e582c46cec22a130adf4b9d7d950fba0 HEAD\0multi_ack thin-pack side-band side-band-64k ofs-delta shallow no-progress include-tag
+   00887217a7c7e582c46cec22a130adf4b9d7d950fba0 HEAD\0multi_ack thin-pack
+		side-band side-band-64k ofs-delta shallow no-progress include-tag
    00441d3fcd5ced445d1abc402225c0b8a1299641f497 refs/heads/integration
    003f7217a7c7e582c46cec22a130adf4b9d7d950fba0 refs/heads/master
    003cb88d2441cac0977faf98efc80305012112238d9d refs/tags/v0.9
@@ -421,7 +422,7 @@ entire packfile without multiplexing.
 
 
 Pushing Data To a Server
-========================
+------------------------
 
 Pushing data to a server will invoke the 'receive-pack' process on the
 server, which will allow the client to tell it which references it should

Documentation/technical/shallow.txt

@@ -1,6 +1,12 @@
-Def.: Shallow commits do have parents, but not in the shallow
+Shallow commits
+===============
+
+.Definition
+*********************************************************
+Shallow commits do have parents, but not in the shallow
 repo, and therefore grafts are introduced pretending that
 these commits have no parents.
+*********************************************************
 
 The basic idea is to write the SHA1s of shallow commits into
 $GIT_DIR/shallow, and handle its contents like the contents

Documentation/technical/trivial-merge.txt

@@ -74,24 +74,24 @@ For multiple ancestors, a '+' means that this case applies even if
 only one ancestor or remote fits; a '^' means all of the ancestors
 must be the same.
 
-case  ancest    head    remote    result
-----------------------------------------
-1     (empty)+  (empty) (empty)   (empty)
-2ALT  (empty)+  *empty* remote    remote
-2     (empty)^  (empty) remote    no merge
-3ALT  (empty)+  head    *empty*   head
-3     (empty)^  head    (empty)   no merge
-4     (empty)^  head    remote    no merge
-5ALT  *         head    head      head
-6     ancest+   (empty) (empty)   no merge
-8     ancest^   (empty) ancest    no merge
-7     ancest+   (empty) remote    no merge
-10    ancest^   ancest  (empty)   no merge
-9     ancest+   head    (empty)   no merge
-16    anc1/anc2 anc1    anc2      no merge
-13    ancest+   head    ancest    head
-14    ancest+   ancest  remote    remote
-11    ancest+   head    remote    no merge
+ case  ancest    head    remote    result
+ ----------------------------------------
+ 1     (empty)+  (empty) (empty)   (empty)
+ 2ALT  (empty)+  *empty* remote    remote
+ 2     (empty)^  (empty) remote    no merge
+ 3ALT  (empty)+  head    *empty*   head
+ 3     (empty)^  head    (empty)   no merge
+ 4     (empty)^  head    remote    no merge
+ 5ALT  *         head    head      head
+ 6     ancest+   (empty) (empty)   no merge
+ 8     ancest^   (empty) ancest    no merge
+ 7     ancest+   (empty) remote    no merge
+ 10    ancest^   ancest  (empty)   no merge
+ 9     ancest+   head    (empty)   no merge
+ 16    anc1/anc2 anc1    anc2      no merge
+ 13    ancest+   head    ancest    head
+ 14    ancest+   ancest  remote    remote
+ 11    ancest+   head    remote    no merge
 
 Only #2ALT and #3ALT use *empty*, because these are the only cases
 where there can be conflicts that didn't exist before. Note that we